1) Biformites
双形管迹
2) double gun and dual trace oscilloscope tube
双枪双迹示波管
3) double cross stitch
双人字形线迹
4) double U tube
双U形管
1.
Establishes an experiment system for single U tube,double U tube and tube-in-tube heat exchangers,studies the variation of the heat exchange with time during heat pump continuous and intermittent operating separately.
搭建了实验台,研究了单U形管、双U形管和套管换热器分别在热泵连续运行与间歇运行方式下换热量随时间的变化趋势。
5) 2-ring pipes
双管圆形
6) double elbow pipe
双弯形管
补充资料：迹线
见流线。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条