GB/T 11361-2018
Synchronous belt drives—Trapezoidal toothed pulleys with pitch code MXL,XXL,XL,L,H,XH and XXH 同步带传动-节距型号MXL、XXL、XL、L、H、XH和XXH梯形齿带轮 |
GB/T 32537-2016
Runouts, undercuts and chamfers for Trapezoidal and buttress threads 梯形和锯齿形螺纹收尾、肩距、退刀槽和倒角 |
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