动环O形圈 Rotary O Ring

硅胶O形圈 silicone O-ring

法兰密封用O形圈 O-ring for flange

硅制O形圈 O-RING SILICONE

雾化室O形圈 O-RING TFL COATED CHAMBER

空心金属O形圈 hollow metal O-ring

橡胶O形圈密封 rubber O-ring seal

金属空心O形圈 O-shape hollow metal ring