jamnut and safety wire hold the turnbarrel in position. The above sentence means“防松螺帽和旋转套筒保持保险丝在恰当位置”。
A.1正确答案B
jamnut and safety wire hold the turnbarrel in position. The above sentence means“防松螺帽和旋转套筒保持保险丝在恰当位置”。
A.1正确答案B
