气动门热工设备故障检查方法?
参考答案:
⑴检查电源是否正常。
⑵检查电磁阀线圈电阻是否合格。
⑶检查电磁阀电源插头及接线是否松动及损坏。
⑷检查电磁阀线圈与阀体连接处是否锈死。
根据所给首字母或汉语提示,将单词的正确形式写在题后相应的横线上。
1. David is thirteen y_______ old.
2. It is a d__________ question. I can’t answer it.
3.Lisa can p________ the piano very well .
4.Our math teacher is very s_______ with us .
5. Tuesday is the t_______ day of a week.
水泵一级保养和二级保养周期为多少?