1、挖机的小臂吸油阀有问题，要调一下。
1. There is a problem with the safety oil suction valve of the small arm of the excavator. It needs to be adjusted.
2、挖机压力补偿阀故障，要清洗。
2. The pressure compensation valve of the excavator is in fault and needs to be cleaned.
3、还有就是挖机的电磁阀脏了，要清洗。
3. Also, the solenoid valve of the excavator is dirty and needs to be cleaned.
4、挖机的小臂压力流量太大了。
4. The pressure flow of the jib of the excavator is too large.
伸缩臂斗杆拥有比华体会国际 更大的挖掘机深度，铲斗也更大，因此效率远高于后者。同时需要的摆动空间更少，适合紧凑的位置，也不需要道路。当然，这种工具也不是随便一台挖掘机就可以安装的，通常只用于20吨以上的挖掘机。华体会国际 租赁
The telescopic boom has a deeper excavator depth and a larger bucket than the extended boom excavator, so the efficiency is much higher than the latter. At the same time, it needs less swing space, suitable for compact position, and does not need road. Of course, this kind of tool can not be installed by any excavator, usually only used for excavators of more than 20 tons. Long arm excavator rental
平衡阀有故障或油管中有空气也是伸臂不能回缩的主要原因，如果因进油管产生泄漏而进气，可先排除泄漏，然后反复拉推操纵杆，使气体沿回油路回油箱;若平衡阀有故障，须缓慢地拧开从平衡阀到下腔进油口的空心螺栓，让伸缩缸下腔液压油从接头缝隙中慢慢流出，这时伸缩臂在自重作用下会自动缩回，然后再检查平衡阀控制油口小孔是否堵塞。
Failure of balance valve or air in oil pipe is also the main reason why the boom can not be retracted. If the air enters due to the leakage of oil inlet pipe, the leakage can be eliminated first, and then the control lever can be pulled repeatedly to make the gas return to the oil tank along the oil return path; If the balance valve fails, slowly unscrew the hollow bolt from the balance valve to the oil inlet of the lower chamber to let the hydraulic oil in the lower chamber of the expansion cylinder flow out of the joint gap slowly. At this time, the expansion arm will automatically retract under the self weight, and then check whether the small hole in the control oil inlet of the balance valve is blocked.
桩基础由基桩和连接于桩顶的承台共同组成。若桩身全部埋于土中，承台底面与土体接触，则称为低承台桩基;若桩身上部露出地面而承台底位于地面以上，则称为高承台桩基。建筑桩基通常为低承台桩基础。高层建筑中，桩基础应用广泛。
The pile foundation consists of a foundation pile and a bearing platform connected to the pile top. If the pile body is completely buried in the soil and the bottom of the bearing platform is in contact with the soil, it is called low bearing platform pile foundation; if the upper part of the pile body is exposed to the ground and the bottom of the bearing platform is above the ground, it is called high bearing platform pile foundation. The pile foundation of building is usually low bearing platform pile foundation. Pile foundation is widely used in high-rise buildings.
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