| 1. | The veteran excavator richard leakey declared in 1977: "there is no single center where modern man was born. "
老资格的考古挖掘家里查德利基在1977年声称：“现代人没有单一的诞生中心。” |
| 2. | In soft clay, tubes of the extending type can easily be pushed down through the clay by using a mechanical excavator .
在软泥中，可以利用挖掘机，很容易地把需要延伸的管子穿过泥土推下去。 |
| 3. | Cable operated excavators volumetric rating for buckets
机械挖掘机铲斗.容量标定 |
| 4. | Crawler excavators with electric power . basic parameter
履带式电动挖掘机基本参数 |
| 5. | Anatomy of typical failures of komatsu pc200 - 7 excavator
7型挖掘机典型故障剖析 |
| 6. | Crawler excavators with electric power . specification
履带式电动挖掘机技术条件 |
| 7. | Rules for the inspection of hydraulic excavators for export
出口液压挖掘机检验规程 |
| 8. | Hydraulic excavators . hoe type buckets . volumetric ratings
液压挖掘机.反铲斗容量标定 |
| 9. | Improvement of traveling - purpose gear of w - 4 excavator
4挖掘机行走齿轮的改进 |
| 10. | Hydraulic excavators - testing method of structure strength
结构强度试验方法 |
