Dị ka ihe dị mkpa n'ọhịa nke injinịa plastik, a na-eji ngwaahịa nylon eme ihe ugbu a na igwe, ụgbọ ala, ngwa eletriki, na ụlọ ọrụ nkwukọrịta.N'ebe a, anyị na-ewebata uru nke naịlọn pulleys: 1. High mechanical ike;ịdịte aka dị mma;ezigbo tensile na nkọwa ...
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