1) Positive whirling
正向涡动
2) backward whirling
反向涡动
1.
Bottom drillstring is often in backward whirling during drilling operations,which cause drill tools and bits to be damaged.
钻井过程中,下部钻柱通常处于反向涡动状态,易造成钻具和钻头的损坏。
3) angular eddy motion
角向涡动
1.
A stability analysis for lubricating gaseous film of spiral grooved gas seals subjected to angular eddy motion;
螺旋槽干气密封润滑气膜角向涡动的稳定性分析
4) face-on spiral
正向旋涡星系
5) positive direction linkage
正向联动
1.
Usually,there is a positive direction linkage between gold price and oil price.
黄金和石油的价格波动在大多数时候呈正向联动关系,虽然没有严格的数字比例关系,但是其波动趋势往往相同。
6) jog "forward"
"正向"点动
补充资料：正向
1.定向。 2.房屋坐北面南为正向。
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