WT300钻机注水泵推荐使用N1530机械油润滑。 发布时间:2018-08-09 13:02 │ 来源:www.tikuol.com 题型:判断题 问题: WT300钻机注水泵推荐使用N1530机械油润滑。
题型:判断题 制冷剂管道安装中,不正确的是( )。A.供液管不应出现向上凸起的弯管,吸气管不应出现向下凹的弯管B.从液体干管引出支管,应从干管底部或侧面接出;从气体干管引出支管,应从干管顶部或侧面接出C.制冷剂管道弯管的弯曲半径宜取3.5~4.0倍弯管直径D.氨系统管道可采用铜管,但管内不得镀锌 查看答案
题型:判断题 读一读,选一选,给下列的答句选择对应的问句。( ) 1. __________ Yes. Pass me a fork. ( ) 2. __________ I'd like some rice and soup. ( ) 3. __________ There are four. ( ) 4. __________ He's a doctor. ( ) 5. __________ She's a nurse. A. What would you like?B. Can I help you?C. How many people are there in your family?D. What's your mother?E. What's your father? 查看答案