The front and back could be pushed and pulled,also and the Quartet solid design, to solve the non-professional construction personnel derailment and derailment problems. Tungsten steel belongs to the cemented carbide, also known as tungsten and titanium alloy. Hardness can reach 89 ~ 95HRA, because of this, tungsten steel products (common tungsten steel watch),...


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(as of November 13, 2017 4:29 am GMT+0000 - Details)