SJ/T 10161.7-1991
VacuuM rubber seal plane flanges. Dimensions of "O" rubber sealing rings 真空橡胶密封平面法兰 “o”形橡胶密封圈尺寸 |
QB 1110-1991
(Polyurethane, polystyrene, polyethylene foaM production safety technical regulations) 聚氨酸 ,聚苯工烯 ,聚乙烯泡沫塑料生产安全技术规程 |
QB/T 1035.1-1991
(DeterMination of food additive sodium tripolyphosphate. Heavy metals (Pb) content) 食品添加剂.三聚磷酸钠.重金属(以铅计)含量的测定 |
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