protective lining meaning in Chinese

保护衬里
防护内衬

Standard test method for chemical resistance of protective linings
防护衬里耐化学侵蚀性的标准试验方法
100mm . cement - mortar protective lining and coating for steel water pipe - 4 in 100 mm and larger - shop applied
钢制水管用水泥砂浆保护衬和覆层.大于等于4英寸
Standard specification for design and fabrication of flue gas desulfurization system components for protective lining application
烟气脱硫系统组件保护性衬砌的设计和制造