单项选择题
A.Keep the wire soft and manageable B.Lubricate the inner wires and prevent wear C.Prevent kinking D.Prevent rotting
A.One shot of chain for every ten feet of water B.One shot of chain for every fifteen feet of water C.One shot of chain for every thirty feet of water D.One shot of chain for every ninety feet of water
A.Chain B.Ring C.Solid thimble D.A fishplate