-SQB-BC series -New type device -Patent Number:ZL 2006 2 01108870 Patent ... are used for the Weight Sensor of Cantalever Girder Device,with the straight screw and nut to adjust ... locking the height of Weight Sensor of Cantalever Girder Device.2,Using our our products with pressure head ... foundation rough.3,Head locking device SQB-A-BC,Weight Sensor of Cantalever Girder Device is a significant invention ...