German Institute for Standardization. German name: Deutsches Institut für Normung e.V. German abbre...

1. Soluble emulsified cleaning agent Soluble emulsifiers usually contain clay, solvents, emulsifiers...

1. Select a power supply with straight external characteristics, and select positive polarity (the ...

1. The intuitive difference between stainless steel pan head screws and round head screws is that th...

In terms of inner hexagon, there are two versions of the national standard, one is GB70-76, the 76 y...

Screws refer to parts used in construction machinery. It is a type of threaded parts with sharp ends...