【正文】 pment. This bination of equipment was supplied in a variety of forms: Reich, Ibag and Liebherr, for example, supplied cranes and concrete mixing machines designed to be used together. Important slewing tower crane manufacturer. The bridge type hoist crane car consists of protmoted anization， the car frame，the car movement anization， hoisting mechanisms and so on. Its operation structure is posed of reducer， the driving wheel group， the driven wheel group， the transmission shaft and some connect fitting. The core of this structure is the design of the reducer. This bridge type hoist crane is be used to the hydroelectric power station. It is installed in the expanded workshop of Fengman water and electricity is used to installing,examining and repairing the waterturbine generator set and its accessorial equipments in the water and electricity station are large or mediumsize. These equipments have a high request on the load of bridge type hoist crane , so they also have a high request on the capability of the reducer. Grab bridge bridge crane is running on the elevated track, the car driven by the lifting of materials crawl grab a bridgecrane. Bridge laying on both sides along the elevated track on the vertical run, lifting trolley along the bridge in laying the track on the horizontal run, a rectangular scope of work, you can make full use of space below the bridge lifting material from Ground equipment hindered. Grab bridge cranes widely used in power plants, Mei Chang, and other needs of bulk material handling of the occasion, because of the heavy equipment, transportation difficulties installation, testing the quality of their products in general need in the field. Therefore, control equipment requirements for wiring, small size and portability. And the use of fixedsite conditions, also called a random testing equipment manual control functions to ensure the safety of operation. With the lifting of the transport requirements of the mechanical control continuously improve, more and more advanced means of control. At present the domestic bridge crane control system requires people at the scene to control, control methods are backward. In small and mediumsized crane, the most direct control over the use of controllers, car running, Lord, vice hook upgrade, dropped weights and speed Crane work needs more technology. Construction of tower cranes are the main vertical transportation equipment and also a measure of construction panies and equipment strength of the important logo, in today39。Lorain Motocrane39。技術(shù)人員應該隨著實際經(jīng)驗的提升，直接從制造商哪里獲得標準訓練。 當這些需要得到滿足，起重機作業(yè)應進行嚴格按照有關(guān)制造商的指示，工程原則和政府的法律。 攀爬架的設(shè)計，在制造商之間存在不同，但設(shè)計的步驟在原則上是相似的。攀登人員容易遭受到影響安全性至關(guān)重要的決策所帶來的壓力。攀登行動更是一個風險的行動，其災難性非常高。你會如何感覺，下一次你決定要坐飛機？在加利福尼亞州，掌握一對剪刀在頭發(fā)沙龍比操作有潛在危險的起重機械需要更多的時間訓練。不過，建造業(yè)是把不合格人員放在建 筑起重機的駕駛位上，甚至沒有通過今天的測試。其安全問題仍然是建筑施工中的憂患 。在中小型起重機中 , 大都采用控制器直接控制大、小車運