Spectacle Frames Testing Equipment Hinge Cycle Tester for testing the durability of the eyesglass
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- เผยแพร่เมื่อ 9 ก.ย. 2024
- www.lab-testeq...
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To determine the spring hinge of the frame has a certain durability, can withstand a certain number of opening and closing activities and maintain the original state, the purpose is to detect the change of the spring force of the spring hinge.