氨基甲酸乙酯衬垫采用定点浇铸工艺，在整个阀体、阀腔、填料腔和法兰面区域表面形成全面连续的覆盖衬垫。
The urethane liner is cast in place to form a continuous liner throughout the entire body, chest, packing chamber and flange face area.
以插图及表格形式论述了法兰、管段、三通、弯头和填料泄漏勘测的具体要求和数据。
The specific requirements and basic data for the flange, pipe-segment, tee, elbow, and stuffing box were expounded with the figures and lists.
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