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trapezoidal screw thread | |||
trapezoid thread | |||
trapezoidal thread; acme screw thread | |||
acme thread; buttress thread | |||
leaning thread | |||
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Acme thread | |||
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acme screw thread (顶角为29°) | |||
acme screw thread | |||
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trapezoid thread | |||
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acme screw thread |
梯形 螺纹: 29 phrases in 8 subjects |
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