但是马乔丽被铅锤的声响惊醒.Marjorie was, however , woken by the sound of plumbing.一种绑在一条窄木板上的铅锤线.A horizontal line plane at right angles to the plumb.用铅锤来检查从溴控制螺线管到溴供给器、从溴供给器到系统是否在一条直线上.Plumb from the BCD control solenoid to feeder a...
报道一种快速检测冰箱除臭器对乙硫醇驱除效率的气相色谱分析方法.A gas chromatographic method to quickly test the efficiency of refrigerator deodorizer in eliminating ethanethiol paper....