【简答题】在液压系统中为什么要设置卸荷回路?常用的卸荷回路有哪些?
【简答题】卸荷回路一般分为:采用 滑阀机能的卸荷回路、采用 换向阀的卸荷回路、采用 的卸荷回路。
【简答题】根据语境,填入适当的词语或句子,补全对话。 A: 1. _ was Paul's party? B: Oh, it was a disaster. A: 2. _ ? B: I was supposed to 3. _ at 7:00, but I was 20 minutes late. A: I see. B: Then when I saw Paul's Mom, I kissed her....
【简答题】. 第二节:完形填空(共20小题;每小题1分,满分20分) 请认真阅读下面短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。 I was caught in the war and put to prison.I was sure that I was to be killed,I became terribly nervous.I reached in m...
【单选题】多用于系统需要保压的卸荷回路中,常与蓄能器配合使用的泄荷回路是()。