GB/T 39545.3-2020
Design and selection of coMponents for enclosed gear drives—Part 3: Shaft-to-hub juncture with keyless fits 闭式齿轮传动装置的零部件设计和选择 第3部分:轴和轮毂的无键配合连接 |
GB/T 39710-2020
Polycarbonate / acrylonitrile-butadiene-styrene (PC / ABS) Material for charging spot housing of electric vehicle 电动汽车充电桩壳体用聚碳酸酯/丙烯腈-丁二烯-苯乙烯(PC/ABS)专用料 |
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