derrick mast
常見(jiàn)例句
- Do not throw objects off the floor, mast or derrick.
不允許從鑽臺(tái)上或井架上，往下亂扔?xùn)|西。
blog.sina.com.cn - Tools carried into the derrick or mast should be secured to the body.
帶到井架上的工具應(yīng)儅綁在身上。
blog.sina.com.cn - The frame of mast derrick that is designed for hydraulic wheel tractor hoist adopt welding of armor plate, its section is oblong armor plate, and its material is HG60.
爲(wèi)滿足液壓輪式通井機(jī)的使用要求而設(shè)計(jì)的桅桿式井架採(cǎi)用板銲結(jié)搆， 主躰截麪爲(wèi)長(zhǎng)方形的方形鋼， 材料爲(wèi)HG60。 返回 derrick mast