Abstract: A hydraulic pipe fixing apparatus for a boom-swing type excavator is disclosed, which makes hydraulic hoses for attachments and hydraulic hoses for additional option devices be arranged in predetermined positions inside a boom supporter (4).

Abstract: A hydraulic circuit for construction equipment is provided, which supplements hydraulic fluid of a hydraulic pump for a cooling fan and hydraulic fluid of a main hydraulic pump and uses the supplemented hydraulic fluid as a hydraulic source of a RCV in order to supply signal pressure to a control valve that controls the driving of a hydraulic actuator.

Abstract: A semiconductor device is fabricated by, inter alia, forming a sacrificial liner on an active portion of a semiconductor substrate, oxidizing the sacrificial liner to transform the sacrificial liner into a gate dielectric layer, and forming a gate on the gate dielectric layer.

Abstract: Disclosed is a brake device for braking front and rear axles by working oil supplied to front and rear brake cylinders from a hydraulic pump according to the control of a brake pedal.

Abstract: A semiconductor device including a gate insulation pattern on a substrate, and a semiconductor gate pattern including an amorphous silicon pattern and a polycrystalline silicon pattern stacked on a side of the gate insulation pattern opposite to the substrate. The amorphous silicon pattern includes anti-diffusion impurities that suppress diffusion of impurity ions in the semiconductor gate pattern.

Abstract: A blower housing of a hydrogen recirculation device for a fuel cell vehicle includes a plurality of cooling pins installed on a perimeter of a housing body installed in a fuel processing system of the recirculation device. The cooling pins are arranged in parallel with air flow, thereby reducing a temperature deviation and the highest temperature point.

Abstract: A hydraulic system with an improved complex operation is provided, which can prevent the generation of shock in a boom by delaying pressure supply during start and end of pilot signal pressure supplied to a spool for controlling an option device when a boom ascending operation and an operation of an option device are simultaneously performed or when such a simultaneous operation of the boom and the option device switches over to an independent operation of the boom.

Abstract: A hydraulic system with an improved complex operation is provided, which can prevent the generation of shock in a boom by delaying pressure supply during start and end of pilot signal pressure supplied to a spool for controlling an option device when a boom ascending operation and an operation of an option device are simultaneously performed or when such a simultaneous operation of the boom and the option device switches over to an independent operation of the boom.

Abstract: An apparatus for fixing hydraulic pipes for a zero tail swing excavator is provided, which can simplify an assembling process of hydraulic pipes and improve the workability by dividedly forming intermediate sides of the hydraulic pipes for supplying hydraulic fluid from a main control valve to hydraulic cylinders and jointly fixing the dividedly formed intermediate sides of the hydraulic pipes by a connection means in a narrow space between a boom and an upper swing structure due to the characteristic of the zero tail swing excavator.

Abstract: A blower housing of a hydrogen recirculation device for a fuel cell vehicle includes a plurality of cooling pins installed on a perimeter of a housing body installed in a fuel processing system of the recirculation device. The cooling pins are arranged in parallel with air flow, thereby reducing a temperature deviation and the highest temperature point.

Abstract: A hydraulic circuit for heavy equipment having a variable control device is provided, in which variable relief valves for variably controlling operating pressure and flow rate of an option attachment are installed inside a main control valve, and pressure of the variable relief valves is variably controlled through selection of a preset option working mode.

Abstract: An apparatus for attachment of hydraulic valves for controlling working devices of heavy equipment is provided, which can reduce a lead time for attaching and assembling a main control valve, an accessory valve, and valve blocks for jointly connecting the respective valves with hydraulic piping, to an upper swing structure.

Abstract: The present invention relates to human insulin expression plasmids and a method for producing insulin using the same. The plasmids comprise a sequence encoding a compound of the formula R—B—X-A, in which R is a leader peptide of the formula of Met-Thr-Met-Ile-Thr-Y (SEQ ID NO: 36), in which Y is one selected from lysine, arginine, a peptide containing lysine as an amino acid at its C-terminal, or a peptide containing arginine as an amino acid at its C-terminal; B is human insulin B-chain or analogue thereof; X is a peptide connecting B with A; and A is human insulin A-chain or analogue thereof. The method for preparing insulin using the plasmids according to the present invention converts the proinsulin fusion protein into human insulin in a single enzymatic cleavage process and minimizes the generation of by-products after the enzymatic cleavage, thereby producing insulin at a high yield.

Abstract: The present invention relates to a heavy equipment having an oil pollution degree diagnosing function, and an oil pollution degree measuring system on a network using the same, and an operation method, and in particular to a heavy equipment which is capable of measuring a pollution state of an engaging chain heavy equipment oil of a complicated hydraulic apparatus based on a phenomenon that an intensity of a transmitting light is different based on the amount of a pollution particle contained in an oil by transmitting a sensor light into an oil which circulates in a heavy equipment which is driven by a hydraulic system, and an oil pollution degree measuring system on a network, and an operation method of the same which are capable of diagnosing an oil measuring value of each heavy equipment in a remote server and informing an oil exchanging time and an abnormal state of a hydraulic system.

Abstract: The present invention relates to a heavy equipment having an oil pollution degree diagnosing function, and an oil pollution degree measuring system on a network using the same, and an operation method, and in particular to a heavy equipment which is capable of measuring a pollution state of an engaging chain heavy equipment oil of a complicated hydraulic apparatus based on a phenomenon that an intensity of a transmitting light is different based on the amount of a pollution particle contained in an oil by transmitting a sensor light into an oil which circulates in a heavy equipment which is driven by a hydraulic system, and an oil pollution degree measuring system on a network, and an operation method of the same which are capable of diagnosing an oil measuring value of each heavy equipment in a remote server and informing an oil exchanging time and an abnormal state of a hydraulic system.