铜包石棉垫密片 copper cover asbestos gasket ; copper asbestos gasket

铜包石棉衬垫 copper-asbestos packing

铜包石棉垫片 copper-asbestos gasket

铜包石棉环 copper-asbestos ring

包铜石棉垫 cobestos gasket

包铜石棉垫圈 copper clad asbestos gasket