He's plain Brack-Brain , who cannot even cope with such a small matter.
他真是个笨蛋, 连这点小事都干不了.
Sealing and lubrication of piston in brack cylinder on railway cars in our country
我国铁路车辆制动缸活塞的密封与润滑
I'm... I'm sorry about the Brack hearing.
听证会的事我很抱歉
The Reason Of the Drum Brack Squeal and-Its Prevention
鼓式制动器制动尖叫的机理及其预防
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