单项选择题
The maximum theoretical stress that can be developed on a guy in a yard and stay rig is limited by the（）.
A.lifting capacity of the winch B.location of the boom C.position of the guy D.weight of the load
单项选择题 The load chart of a crane enables the operator to combine the load radius with boom length to determine the（）.
单项选择题 The garboard strake is the（）.
单项选择题 The function of the bilge keel is to（）.
