Pluggen.普拉奇plugn.塞子；插头；推销；火花塞；口嚼烟v.塞；堵；宣传；插上插头；苦干Plugging Mechanism堵塞机理plugged-off tubes焦炭堵塞管plug in termination插塞式终端plug-and-socket插头插座plug-in connector插入式连接器plugging properties封堵性质plug flow fermenter活塞流连续发酵罐plugging technology堵漏技术plug-in amplifier插入式放大器plugging capacities封堵性能