According to the basic theory of vibration, the article considers that vibration in the process of excavation can reduce the digging force and improve the energy efficiency greatly.
本文从振动的基础理论出发，认为在挖掘过程中施加切削方向的振动后，能够大大降低作业过程中的挖掘阻力，并提高能量的利用效率。
Evil aggressors also in trouble, force us to identify the "Nanjing Treaty" and the unequal treaties, called the people to help them to hard labor, digging coal mine, giving them as cattle and horses.
可恶的侵略者还趁火打劫，逼我们鉴定《南京条约》等不平等的条约，叫老百姓帮他们做苦工，挖煤矿，给他们当牛做马。
How to obtain the way of power source of the strong arc force is shown And the arc digging action of SCR rectifier is the same as that of DC arc wilding generator.
并提出获得强电孤力电源的途径。从而使可控硅整流焊机的电弧穿透力与直流旋转焊机相当。
How to obtain the way of power source of the strong arc force is shown And the arc digging action of SCR rectifier is the same as that of DC arc wilding generator.
并提出获得强电孤力电源的途径。从而使可控硅整流焊机的电弧穿透力与直流旋转焊机相当。
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