法兰球阀flange 3 pcs ball valve
焊接式三片球阀 welded 3 pcs ball valve
横式气动三片式球阀 pneumatic 3 pcs ball valve
快装三片式球阀TC 3 pcs ball valve
内螺纹三片式球阀Thread 3 pcs Ball Valve
轻便型球阀 Stainless Steel Sanitary ball valve
卫生级三通球阀 three way ball valve
无泄露无死角无滞留球阀Sanitary No Dead Space Ball Valve
直通球阀 One way ball valve
卫生级蝶式球阀
