To complete the installation and unloading of steel bracket of such great weight smoothly involves complex structure stress and many difficulties in swing.
要安全顺利完成如此大重量的钢支架安装与卸架施工，结构受力复杂，吊运难度大。
Oil drum carrier is featured by its simple-and-light-structure outline design which enables single one man complete transporting, stacking and loading & unloading.
油桶搬运车的优点是整车结构简单轻巧，操作简单省力，一个人即可完成整个油桶的搬运、堆高、和装卸车！
The back-tipping of boom of crawler crane due to sudden unloading must be considered in design of anti-back-tipping device of crawler crane to ensure the stability of the complete crane.
履带起重机在突然卸载时臂架后倾是整机稳定性和防后倾机构设计要考虑的工况。
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