单项选择题
On no account（）to be exceeded.
A.is the S.W.L. of the crane B.are the S.W.L. of the crane C.the S.W.L. of the crane is D.the S.W.L.of the crane are
单项选择题 On a ship crane，the load chart relates the allowable load to the combination of boom length and（）.
单项选择题 Oil product samples should be taken from the（）.
单项选择题 For any given pedestal crane，when the boom is lengthened，the lifting capacity is（）.
