Abstract: A steering linkage assembly includes a support member; a connecting portion rotatably arranged on the support member and connected to an external steering member; a first steering linkage; a first ball head rod provided with one end connected to a ball head at a first end of the first steering linkage and the other end connected to the support member; a second steering linkage; and a steering rotating shaft mounted at a first end of the second steering linkage and rotatably connected to the support member. A rotating centerline of the steering rotating shaft is not parallel to that of the connecting portion. An included angle is formed between a connecting line of ball head centers of the first and second ball head rods and a connecting line of a rotating center of the steering rotating shaft and a ball head center of the third ball head rod.

Abstract: A charging cabinet system includes a power supply system, a controlling and displaying system, and a plurality of charging compartments. The power supply system is connected with the controlling and displaying system. The charging compartment is connected with both the power supply system and the controlling and displaying system. The charging compartment includes: a charging module for charging a low-power battery; a driving module for moving the battery out of the charging compartment or moving the battery into the charging compartment; a detection module for detecting whether a fully charged battery is picked by a user after being moved out of the charging compartment for a period of time; and a controller connected with the charging module, the driving module and the detection module, and connected with the controlling and displaying system. The technical effect of the disclosure is that it can effectively prevent the battery from being lost.

Abstract: A charging compartment system and relates to a technical field of charging device, the charging compartment system includes a charging module for charging a low-power battery; a driving module for moving a battery out of or into the charging compartment; a controller electrically connected with both the charging module and the driving module. The charging compartment system further includes a detection module for detecting whether a fully charged battery is picked by a user after being moved out of the charging compartment for a period of time, if the fully charged battery is not picked, the driving module moves the fully charged battery into the charging compartment, and if the fully charged battery is picked, the controller prompts that the charging compartment is an empty charging compartment. The disclosure has technical effect that the charged battery can be ejected, and users can save time and labor when picking the battery.

Abstract: An intelligent safety frame capable of easily replacing and protecting battery includes a front beam, a battery mounting box, a rear beam, a cushion mounting seat and a rear tail box mounting seat, wherein a rear tail box is mounted on the rear tail box mounting seat, the cushion mounting seat is rotatably mounted on the rear beam, a battery mounting cavity is defined in the battery mounting box, a threading box is provided on a side of the battery mounting box, a first wire-in cavity is provided in the threading box, a first threading slot is provided on a side of the battery mounting cavity, a wire outlet is provided on a side of the threading box, a second intelligent lock mounting slot is provided at the upper end of the rear beam, and a lock catch is provided on a side of the cushion mounting seat.

Abstract: An intelligent safety frame capable of easily replacing and protecting battery includes a front beam, a battery mounting box, a rear beam, a cushion mounting seat and a rear tail box mounting seat, wherein a rear tail box is mounted on the rear tail box mounting seat, the cushion mounting seat is rotatably mounted on the rear beam, a battery mounting cavity is defined in the battery mounting box, a threading box is provided on a side of the battery mounting box, a first wire-in cavity is provided in the threading box, a first threading slot is provided on a side of the battery mounting cavity, a wire outlet is provided on a side of the threading box, a second intelligent lock mounting slot is provided at the upper end of the rear beam, and a lock catch is provided on a side of the cushion mounting seat.

Abstract: The disclosure relates to genetic engineering, and more particularly to a CHO cell line, its construction and a recombinant protein expression system using the CHO cell line. Regardless of the presence screening pressure, the recombinant protein expression system constructed by the 60th passage of the recombinant APRT gene-deficient CHO cell line is much higher than the normal recombinant CHO cell in the expression retention of the target protein EGFP. In the absence of G418 screening pressure, the expression level of the recombinant vitronectin in the recombinant protein expression system constructed by the 30th passage of the recombinant APRT gene-deficient CHO cell is significantly higher than the expression level of the corresponding target protein in the normal recombinant CHO cells.

Abstract: An electronic lock includes a lock shell, a rope winded disc, a lock rope head, a sliding lock block, and a controlling and driving device. The lock shell has a first lock hole and an insertion hole. A lock rope is winded at the rope winded disc, and the lock rope is operatively pulled out from the rope winded disc or returns inside the rope winded disc. The lock rope head is inserted into the insertion hole and connected with one end of the lock rope. The sliding lock block is disposed inside the lock shell through a spring, and one end of the sliding lock block is placed in the first lock hole.

Abstract: The invention relates to genetic engineering, and more particularly to a Dnmt3b gene-deficient CHO cell line, a preparation method and an application thereof and a recombinant protein expression system using the same. The invention adopts a CRISPR/Cas9 gene editing technique to knock out the Dnmt3b gene from the CHO cells to produce the Dnmt3b gene-deficient CHO cell line, which can significantly improve the expression level and stability of the target gene in CHO cells, overcoming the defects existing in the current CHO cell expression system, such as low expression level and stability. It has been demonstrated that using the CHO line provided herein to express a recombinant adalimumab can significantly increase the expression level of the recombinant adalimumab, indicating that the CHO cell line can be widely used to enhance the expression of target proteins.

Abstract: This invention provides an electronic lock and a use thereof, and the electronic lock includes a lock shell, a rope winded disc, a lock rope head, a sliding lock block, and a controlling and driving device. The lock shell has a first lock hole and an insertion hole. A lock rope is winded at the rope winded disc, and the lock rope is operatively pulled out from the rope winded disc or returns inside the rope winded disc. The lock rope head is inserted into the insertion hole and connected with one end of the lock rope. The sliding lock block is disposed inside the lock shell through a spring, and one end of the sliding lock block is placed in the first lock hole.