螺丝螺纹加长起吊安全吗，在哪里做螺纹加长旋转吊环，深圳广臣高品质万向旋转吊环媲美进口产品，广臣外贸出口万向旋转吊环征经销商，深圳市广臣起重设备有限公司新款外贸万向旋转吊环诚招销售商，区域代理商，价格优惠，厂价直销，出口欧美，品质卓越。Swivel hoist ring，Mold Lift Ring ,Lifting Eyebolt,Pivoting Lift Ring,Side Pull Style Hoist Rings,Lifting point,Inch Standard Centre-Pull Hoist Ring,Metric Side Pull Style Hoist Rings, Pivoting Lift Ring, Swivel Eyebolt, Pivoting Lift Ring, Side-Pull Traditional Hoist Ring, Side Pull Style Hoist Rings,Side Swivel Hoist Rings。