下面三位四通换向阀使用正确的是()。
A.操作时手柄不用搬到位
B.在手柄上加装锁紧装置
C.气缸摆动处润滑点,应定期打油润滑
D.在超高压操作时可以换向
参考答案:C
- There is something wrong with your bike, ___?
-Yes. I'll have it _ tomorrow.
A.isn’t it; mend
B.isn’t there: mended
C.isn't it; mended
D.isn't there; mend
润滑油进口总管温度过高的原因有哪些?