题目内容

铸造工艺文件包括铸造工艺图和()。

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请写出成品球欠烧的现象、原因和处理措施。

同一车辆两端车钩中心至轨面的高度差不大于40mm。

A. 正确
B. 错误

上作用车钩的钩提杆组装后要求其横动量不大于100mm。

A. 正确
B. 错误

Which statement is FALSE concerning precautions during fueling operations?()

All engines,motors,fans,etc. should be shut down when fueling
B. All windows,doors,hatches,etc. should be closed
C. A fire extinguisher should be kept nearby
D. Fuel tanks should be topped off with no room for expansio

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