加長門式起重機

　　起重機械，是指用于垂直升降或者垂直升降并水平移動重物的機電設備，其范圍規定為額定起重量大于或者等于0.5t的升降機；額定起重量大于或者等于3t（或額定起重力矩大于或者等于40t·m的塔式起重機，或生產率大于或者等于300t/h的裝卸橋），且提升高度大于或者等于2m的起重機；層數大于或者等于2層的機械式停車設備。
　　根據國家質檢總局頒布的《特種設備目錄》，起重機械分為：橋式起重機、門式起重機、塔式起重機、流動式起重機、門座式起重機、升降機、纜索式起重機、桅桿式起重機、機械式停車設備。

　　Hoisting machinery refers to the electromechanical equipment used for vertical lifting or vertical lifting and horizontal movement of heavy objects, and its scope is defined as the lift with rated lifting capacity greater than or equal to 0.5t; Crane with rated lifting capacity greater than or equal to 3t (or tower crane with rated lifting torque greater than or equal to 40t · m, or loading bridge with productivity greater than or equal to 300t/h) and lifting height greater than or equal to 2m; Mechanical parking equipment with more than or equal to 2 floors.
　　According to the Catalogue of Special Equipment issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, lifting machinery is divided into: bridge crane, gantry crane, tower crane, mobile crane, gantry crane, elevator, cable crane, mast crane, and mechanical parking equipment.