A spare replacement sleeve should be placed on order when this valve is placed in service.
当阀门预备维修时应该订购备用更换套管。
From a spare part to a comprehensive drilling system and from a generic valve to a fully integrated supply chain process, National Oilwell Varco delivers unlimited customer solutions.
从一个备件到一套完整钻井系统，从一个普通的阀门到一套集成的供应链程序，国民油井华高提供各种无限制的用户解决方案。
High quality spare parts of world famous brands are mainly used in electrical materials appliance, electric appliance, main electric engines, pneumatic valve, transmission parts cooling system.
电料、电器、主电机、气动阀门、传动部位以及制冷系统等一些主要零配件均采用世界名牌品质零配件。
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