承梁垫石 padstone ; pad

膝上垫石 lapstone

支承垫石 bearing pad stone ; bearing plate bed

垫脚石 Stepping Stones ; Treadstone ; stepping-stone ; Steppingstone

压缩石棉垫片 compressed asbestos class gasket ; Compressed asbestos gasket

石棉垫片 [材] asbestos gasket ; PTFE impregnated asbestos gasket ; sunwell ; AG

石棉垫圈 asbestos gasket ; asbestos washer ; asprimeos were it

石棉垫 asbestos pad ; a estos pad ; asbestos cushion ; asbestos packing

祖母绿垫层石 ermerald saude