The transducer slides into an adapter mounted in the axle and is retained in place by ____(键槽)and a ____(保持器) nut assembly.
A.keyways，slot;
B.retainer, holder;
C.key, retainer;
D.keyways,retainer;
正确答案是D
The transducer slides into an adapter mounted in the axle and is retained in place by ____(键槽)and a ____(保持器) nut assembly.
A.keyways，slot;
B.retainer, holder;
C.key, retainer;
D.keyways,retainer;
正确答案是D