IEC 60050-811
国际电工词汇 第811章:电气牵引
International Electrotechnical Vocabulary Chapter 811: Electric traction
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International Electrotechnical Vocabulary Chapter 811: Electric traction
Round thread with clearance and flat flank with pitch 7 mm; limits of sizes and deviation - tolerances and permissible wear of thread gauges
Trapezoidal threads, single and double start, with clearance, for rail vehicles - Part 3: Thread gauges, gauge dimensions and permissible wear of gauges