Abstract: A push-chain includes a plurality of push-chain links, each push-chain link of the plurality of push-chain links including two strip-shaped mounting pieces disposed opposite one another and one connecting piece that connects at most half of an end face of the two mounting pieces at one side. Each of the two mounting pieces is provided with two mounting holes in the length direction. A distance between the two mounting holes is equal to half the length of the mounting piece. The mounting holes on the two mounting pieces are arranged opposite one another, and two corners on another side of each of the two mounting pieces are rounded corners allowing the push-chain to bend. Two adjacent push-chain links of the plurality of push-chain links are hinge-connected in a horizontally staggered arrangement by way of a chain pivot and the mounting holes.

Abstract: Disclosed in the present embodiments are a foldable pressing device and an X-ray machine. The foldable pressing device includes a motor, a lifting member, a pressing member, a linear guide member with a stop position, a pulling member and a resilient member. The lifting member, driven by the motor, causes a sliding element in the linear guide member with a stop position and the pressing member to move upwards. When the sliding element arrives at an uprising stop position, the pressing member, under the effect of the lifting member and the pulling member, overcomes the resistance of the resilient member to realize the folding thereof. The lifting member, driven by the motor, drives the pressing member to move downwards, and the pressing member is unfolded under the effect of the resilient member.

Abstract: A push-chain includes a plurality of push-chain links, each push-chain link of the plurality of push-chain links including two strip-shaped mounting pieces disposed opposite one another and one connecting piece that connects at most half of an end face of the two mounting pieces at one side. Each of the two mounting pieces is provided with two mounting holes in the length direction. A distance between the two mounting holes is equal to half the length of the mounting piece. The mounting holes on the two mounting pieces are arranged opposite one another, and two corners on another side of each of the two mounting pieces are rounded corners allowing the push-chain to bend. Two adjacent push-chain links of the plurality of push-chain links are hinge-connected in a horizontally staggered arrangement by way of a chain pivot and the mounting holes.

Abstract: Disclosed in the present embodiments are a foldable pressing device and an X-ray machine. The foldable pressing device includes a motor, a lifting member, a pressing member, a linear guide member with a stop position, a pulling member and a resilient member. The lifting member, driven by the motor, causes a sliding element in the linear guide member with a stop position and the pressing member to move upwards. When the sliding element arrives at an uprising stop position, the pressing member, under the effect of the lifting member and the pulling member, overcomes the resistance of the resilient member to realize the folding thereof. The lifting member, driven by the motor, drives the pressing member to move downwards, and the pressing member is unfolded under the effect of the resilient member.

Abstract: A carbon fiber bundle dispersion method, which sequentially includes the following steps: a degumming step, an oxidation step, a surface impurity removing step, a film forming step, a first baking step, a carbonization reaction step, a slight acid neutralization step, an alkaline matter rinsing step, a second baking step and a rubbing step. Through the present invention, a carbon fiber bundle can be dispersed into thinner carbon fiber fine bundles, without need to be soaked in a special liquid to keep their dispersion state. In an ordinary air, the respective carbon fiber fine bundles can still maintain a separation state relative to each other, and thus are convenient to be used in a subsequent mixing process.

Abstract: A starch-based biodegradable material composition includes: an enzyme-hydrolyzed starch; and a biodegradable polyester selected from at least one of an aliphatic polyester of polybutylene succinate and an aliphatic-aromatic copolyester. The enzyme-hydrolyzed starch is prepared by hydrolyzing a native starch using a starch-hydrolyzing enzyme. The starch-hydrolyzing enzyme has an activity unit ranging from 15000 to 40000.

Abstract: A starch-based biodegradable material composition includes: an enzyme-hydrolyzed starch; and a biodegradable polyester selected from at least one of an aliphatic polyester of polybutylene succinate and an aliphatic-aromatic copolyester. The enzyme-hydrolyzed starch is prepared by hydrolyzing a native starch using a starch-hydrolyzing enzyme. The starch-hydrolyzing enzyme has an activity unit ranging from 15000 to 40000.

Abstract: A novel microorganism, Penicillium citrinum CCRC 930024 and a process of using the microorganism for the production of compactin comprising cultivating Penicillium citrinum CCRC 930024 in a fermentation medium and recovering compactin from the fermentation broth are disclosed.