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1. The valve-seat refacer was used to coat the valve seat with a protective coating.
阀门座面重新涂层机被用来给阀门座面涂上一层保护性的涂层。
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2. The valve-seat refacer is essential for maintaining the integrity of the valve system.
阀门座面重新涂层机对于保持阀门系统的完整性至关重要。
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3. The valve-seat refacer has been designed to improve the sealing performance of the valvesystem.
阀门座面重新涂层机已经被设计来提高阀门系统的密封性能。