根据渗碳剂的不同,渗碳方法分:()、()、()渗碳。
当贮罐钟罩及塔身升降发生困难时,会破坏水封或使罐体形成()造成塔顶塌陷。
A reciprocating air compressor is running roughly and vibrating excessively, indicating that the ().
A. compressor is overloaded
B. motor is overloaded
C. foundation bolts are loose
D. belts are too tight
SPS-8WP总风缸压力开关动作试验作试验闭合动作压力();断开动作压力()。
A. 640Kpa;490Kpa
B. 540Kpa;490Kpa
C. 540Kpa;390Kpa
D. 500Kpa;490Kpa