Shanghai's metro tops the global rankings, bigger than even the London Tube and New York Underground.
上海地铁的规模位居全球前列,甚至大于伦敦地铁和纽约地铁。
The oil hole zoning and pedal locks, set on the tank tops, used for measuring the elevation and oil tube temperature and sampling, etc.
量油孔分带锁式和脚踏式,安装于油罐顶部,用于测量管内油品的标高和温度及取样等。
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