Screwdriver Specifications Introduction
Screwdriver head type can be divided into different word, Phillips, Torx, star (computer), square head, hex head, Y-type head, etc., in which the word and the cross is the most common in our lives, like installation,
Screwdriver species are there?
Electric screwdriver, by definition is to the electric motor to replace manual installation and removal of screws, usually a combination screwdriver.
45 narrative 40Cr steel quenched and tempered steel and heat treatment process
45 40Cr steel quenched and tempered steel and heat treatment process Quenched quenching and tempering of double heat treatment, which aims to make the workpiece has good mechanical properties.
Brief distinction commonly used standard parts and new and old GB GB between
The difference between the commonly used standard parts and new and old GB GB betweenIn the usual domestic business, the standard of our most frequently encountered is GB (GB) and DIN (German standard).
