[单选题]偏移值和曲折值的统称是()。
正确答案 :D
偏中值
[单选题]A-frames are mounted on the bed plate and support () and cylinder block.
正确答案 :C
the entablature
[单选题]The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to ().
正确答案 :A
assist in a quick cutoff of fuel injection
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