(17) is hanging objects must not run over people or equipment. (18) When a unit of welding crane to set up a special ground, do not allow the use of body ground. (19) The hook is in the lower limit position, must retain more turns on the reel safety ropes. (20) does not allow the crane bumped, but does not allow the use of a crane to promote another crane to work. (21) lifting heavy objects, liquid metal, when explosive and dangerous goods must be slowly lifted from the ground 100 ~ 200mm, test brake reliability. (22) Repair and inspection lights, the voltage must be below 36V. (23) Overhead Crane All electrical equipment enclosure should be grounded. As the trolley track is not in the main beam welding, welding ground measures should be taken. Available ground wire cross-sectional area larger than 75mm2 bare copper galvanized flat iron or 10mm2 or 30mm2 larger than the galvanized steel bar. Ground position or crane cab body should be more than two. Grounding resistance to any point on the power neutral between crane shall be less than 4Ω. (24) to have regular technical safety checks, do preflight preparatory work. LD electric single girder crane with a double girder overhead crane reasonable structure, machine rigidity characteristics. Machine and CD1 type, MD1 model electric hoist supporting the use of a small light lifting machinery. Its starting weight of 1t-20t. Span 7.5-28.5m. Work levels for A3-A4 15-ton bridge crane, working environment temperature -25 ℃ ~ 40 ℃. The products are widely used in various occasions lifting goods factories, warehouses, material, etc., is prohibited in flammable, explosive, corrosive the use of the media environment. Our product has the floor and control room two operating forms. Operating room has open and closed two speed bridge crane, two forms can be installed to the left or right, respectively, according to the actual situation, the entry direction of the side and the two sections to meet user needs in a variety of situations Choose. The largest crane, Wuyishan bridge crane, heavy generous generous by heavy machinery Co., Ltd., Henan Province. Heavy Machinery Co., Ltd., Henan Province, generous (www.hnqizhongshebei.com) (www.hnqizhongshebei.com) strong, credible, in Zhengzhou, Henan engineering, construction crane industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving generous innovative ideas will lead into the brilliant heavy and you work for a better future!