Hinge, Mechanical Door Lock, Detachable Hinge manufacturer / supplier in China, offering 50*50 Zinc Alloy Industrial Distribution Cabinet Door Load-Bearing Hinge, 50*50 Zinc Alloy Pre-Holed Foldable Hinges for Machinery and Equipment, 50*50 180 Degree Exposed Zinc Alloy Folding Hinge for Electrical Cabinet and so on.