小直径管 narrow tube ; macaroni ; narrow-bore tube ; small diameter pipe
精直小管 [解剖] straight seminiferous tubules
直小血管 [组织] vasa recta
直小管 vas rectum ; ductuli recti
直精小管 [组织] tubulus rectus
小直径油管柱 macaroni string ; macaronitubingstring
肾直小管 Tubuli renales recti ; straight renal tubule ; tubuli recti ; straight renal tubules
小直径油管修井机 macaroni rig
近直小管 Proximal straight tubule
肾曲小管直部 straight proximal tubule
九个小管中的五个是直的，里面有升降机，然而其他四个弯曲的管子里面有管道和电线。
Five of the nine smaller tubes are straight and contain elevators, while the other four are more crooked and carry the ducts and wires.
热风由功率强大的鼓风机通过热风总管、环形风管、风口小弯管、直吹管和风口不断鼓人高炉。
The hot air is always carried to the furnace by a powerful turboblower, through the hot blast main, bustle pipe, bootleg, blowpipe and tuyere.
该分布器与原来的多孔直管式分布器比较，具有壁流量小，操作弹性大的优点，而且此分布器结构简单，安装方便。
Compared with perforated pipe distributor, perforated weir-riser distributor has smaller wall flow, bigger operation elasticity and simpler structure, it is easy to install.
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