The veteran excavator richard leakey declared in 1977: "there is no single center where modern man was born. " 老資格的考古挖掘家里查德利基在1977年聲稱:“現(xiàn)代人沒有單一的誕生中心?!?i class="labawb" onClick="playMp3('sound_c_1')">
In soft clay, tubes of the extending type can easily be pushed down through the clay by using a mechanical excavator . 在軟泥中,可以利用挖掘機(jī),很容易地把需要延伸的管子穿過泥土推下去。
Cable operated excavators volumetric rating for buckets 機(jī)械挖掘機(jī)鏟斗.容量標(biāo)定
Crawler excavators with electric power . basic parameter 履帶式電動挖掘機(jī)基本參數(shù)
Anatomy of typical failures of komatsu pc200 - 7 excavator 7型挖掘機(jī)典型故障剖析
Crawler excavators with electric power . specification 履帶式電動挖掘機(jī)技術(shù)條件
Rules for the inspection of hydraulic excavators for export 出口液壓挖掘機(jī)檢驗規(guī)程
Hydraulic excavators . hoe type buckets . volumetric ratings 液壓挖掘機(jī).反鏟斗容量標(biāo)定
Improvement of traveling - purpose gear of w - 4 excavator 4挖掘機(jī)行走齒輪的改進(jìn)
Hydraulic excavators - testing method of structure strength 結(jié)構(gòu)強(qiáng)度試驗方法