This is the overseas oper ator.
我是海外接线员.
The relationship between the digging force at bucket tooth and boundary conditions art critical values. These are the basis for internal force analysis of exca-v ator.
斗齿处挖掘阻力同各边界条件处于临界值的关系,这些是进行挖掘机内力分析的基础。
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