The top of the screw is small and the bottom is big.

Fastener consultant Yu Wenlong thinks there are several situations. Let's see if there is any problem with the silk blank and whether the material is the original size. Yu Wenlong, a fastener consultant, thinks that if the material is the original size, there is something wrong with the washboard, either it is broken or it has not been adjusted properly. If it is broken, it needs to be repaired or replaced. If the adjustment is not good, it can be readjusted.

Yu Wenlong, a fastener consultant, thinks it's best to look up relevant information yourself. Everything I got online was fake. If you don't know how to pretend, you can answer casually. It is simply false or deceptive, which will directly mislead you and even hurt you. Of course, Yu Wenlong, the fastener consultant, thinks that if you have the strength, it is also a good choice to ask the fastener consultant to refer to your technology, grasp the development direction of the enterprise, locate products and customers. Yu Wenlong, a fastener consultant, has been engaged in the fastener industry for more than ten years, and has been engaged in technology, quality inspection, quality assurance, procurement, commerce and other work in the fastener industry, and has accumulated rich industry experience and a large number of technical data, customer data and supplier data.