double tube core barrel sampler  双重岩芯管取样器; 回转取样器

Double-Tube Core Barrel  双筒取心筒; 双单位制工作面

double tube double tube-plate heat exchanger  双管双管板换热器

double core barrel drill  双筒取心钻具

double core barrel with diamond  金刚石单动双管

double core-barrel  双层坑道

double core-barrel drill  双岩心管钻探

double tube double swivel barrel  双管双动岩芯管

single-tube core barrel  单单位制工作面

triple tube core barrel  三管取芯器

triple-tube core barrel  三层取心筒

asymmetric double tube  非对称双管

Closely spaced bias double-tube tunnel  小净距偏压隧道

coiled double-tube heat exchanger  蛇形管换热器

core barrel of double tuberigid type  双层取心筒

core barrel of double tubeswivel type  双层取心筒

Double Barrel  复式岩心管; 双管枪

double barrel carburetor  双筒汽化器

double barrel colostomy  憩室