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[主观题]
_____ is made of a boss with separated blades mounted into it.A.A variable pitch propeller
_____ is made of a boss with separated blades mounted into it.
A.A variable pitch propeller
B.A variable pitch nut
C.A fixed pitch parallel
D.A fixed pitch screw
提问人:网友liuyang1110
发布时间:2022-01-06