产品包括：螺栓、螺钉、螺柱、U型螺栓、预装配的螺钉和垫片组件以及与预装配组件一样加工的无垫圈产品。
Products included are bolts, screws, studs, U-bolts, preassembled screw and washer assemblies (sems), and products manufactured the same as sems except without washer.
简述了缠绕式垫片生产过程中工艺参数的控制原理，结构和工艺参数对产品质量的影响。
The controlling principle of process technology parameters is expounded. The influence of the structure and technology parameters on the quality of spiral wound gaskets is investigated.
单件构造和重型垫片设计保证了产品的可靠性。
One-piece construction and heavy gasket design assure reliability.
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