圆柱管螺纹、普通螺纹、圆锥螺纹、梯形螺纹不属于连接用的螺纹是()。...
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在进行测量前,必须擦净工件的被测表面及量具的测量表面。...
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开关阀门不应用力过猛,开启时不要开过头,当全开启时可倒回一圈。...
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游标卡尺使用时,可以不检查游标卡尺的立尺与副尺零线是否对齐及内外...
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在钳工工具中,V形铁的作用是()。A、支撑铁块用于锻造;B、支撑圆柱面用于划线;C、支撑圆柱面用于錾削;D、不是用于支撑物体的。...
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《电业事故调查规程》所规定的事故包括人身伤亡事故,设备异常运行、...
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钢的含碳量越高,淬火后的硬度和耐磨性越()A、低B、高C、以上都不是...
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若某刚体在平面任意力系作用下平衡,则此力系各分力对刚体()之力矩的代数和必为零。A、特定点;B、任意点;C、重心;D、形心。...
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孔的尺寸,轴的尺寸为,其最大间隙为()。A、0.115;B、0.160;C、0.165;D、0.170。...
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Sunday, September 11, 2022
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