“钉子户”是指最后待拆的房屋，当周围所有房屋都被推平，它就像钉子般显眼。
"Nail houses" are the last homes left standing in areas slated for clearance, so called because they stick out when all around them have been demolished.
将阀帽总装拆离阀腔，采用推针取出四个部分的推力环，拆卸变得简便易行。
Easy dismantling is made possible by dropping the bonnet assembly into the body cavity and driving out the four-segmental thrust rings by means of a push pin.
通过勘探地震信息可以看出：中国西部推覆前锋带的拆离型、褶皱型、前冲型、反冲型等前锋构造。
Through the exploration, earthquake information, we can reach the nappe leading structure modes in the West of China including fold, advance, recoil and so on.
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