| 1. | The industry chains can be produced by the standard of u . s . a , germany , japan , australia etc , including class 30 and high strength class 43 , 70 , 80 , 100 etc . they have the enough standard tension
工业用链可按美国、德国、日本、澳大利亚等国家标准生产，其包括普通30级，高强度43 , 70 , 80 , 100级等，具有足够的达标拉力。 |
