PM screw clamp for concrete pump 1.forging 2.40CR(ASTM 5140) 3.Spraying plastics ... .service life is long 2-3 t PM screw clamp for concrete pump TypeSnap clamp, bolt clamp, screw clamp, wedge clampTechnicalForging, high ... -temperature 1200 forging and intoApplicationConnection of Concrete pump and pump truck pipelineUsed forSchwing, PM, Kyokuto, Sany, Zoomlion ...