其配套机具如反循环砂石泵、泥浆净化设备、套筒式钻头和排渣管、深墙接头用液压双反弧钻具等工艺合理。
The corollary facilities such as reverse circulation sand and gravel pump , slurry purifying equipment , telescopic bit , san and gravel discharge pipe , and hydraulic double inverted arch bit for wall junction are reasonably designed .
反循环泥浆