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  • What to do when the truck hits a long downhill Don’t hit the brakes too often

    What to do when the truck hits a long downhill Don’t hit the brakes too often

    What is the worst conditions of older drivers driving trucks? Long downslope is definitely one of them. Because the long downhill condition is often a high incidence of truck accidents, in order to control the speed, the time and frequency of using the brakes will increase, which also leads to a ...
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  • The difference between various quality hardness levels of bolts

    The difference between various quality hardness levels of bolts

    After so many years of doing machinery, you certainly don’t know the meaning of the screw mark, right? The performance grade of bolts for steel structure connection is divided into more than 10 grades, including 3.6,4.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9. The bolts of class 8.8 and above are ma...
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  • What’s hub bolt?

    What’s hub bolt?

    Hub bolts are high-strength bolts that connect vehicles to the wheels. The connection location is the hub unit bearing of the wheel! Generally, class 10.9 is used for mini-medium vehicles, class 12.9 is used for large-sized vehicles! The structure of the hub bolt is gene...
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