In our team clinic the injection needle used was with a broken coating and a barbed surface so it often hooked the muscles on my back out.
我们队医务室那一把针头镀层剥落,而且都有倒钩,经常把我腰上的肉钩下来。
2
Analyze the cause and treatment of worn working surface of bearing pads for induced draft fan, after welding repair, the broken babbit alloy bearing pads in actual application has good usage effect.