snap coupling size:2''--8'' snap clamp, bolt clamp,used for Zoomlion, PM, Sany,Schwing snap couplingsize:2''--8'' snap clamp, bolt clamp,used for Zoomlion ... clamp, wedge clampSurfacePainting or galvanizingTechnicalPrecision castingApplicationConnection of concrete pump and pump truck pipelineServing brandSchwing, PM, CIFA, Sany, Zoomlion and so on snap coupling