该阀采用锻钢阀体，密封为自润滑工程塑料。
聚甲醛是一种综合性能优良的自润滑工程材料，广泛应用于汽车、机床、化工和电气等领域。
Polyoxymethylene is a high self-lubrication engineering material which is widely used in automobile, machine, chemical engineering and electric industries.
高温自润滑配气阀座是某工程发动机的关键部件。
The high temperature self-lubricating valve actuating mechanism is the key part of an engineering engine.
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