铣削大径定心的花键轴应选用外径尽可能小的(),以减少铣刀的全跳动量。
A.成形铣刀
B.键槽铣刀
C.直齿三面刃铣刀
D.组合铣刀
参考答案:C
SDH设备能根据()字节来判断时钟信号的质量。该值越小,表示相应的时钟质量越高。
Whose duty is it to examine and verify the state and condition of the cargo carried on board?().
A.Tallyman's
B.Marine surveyor's
C.Cargo surveyor's
D.Boarding inspector's