Don't get things mixed up, just the z component of the force becomes Gm triple integral of delta cos phi sine phi d rho d phi d theta.
不要搞混，只是力的z分量罢了,它是Gm∫∫∫δcosφsinφdρdφdθ
The Delta IV Heavy has since completed several more successful lift-offs, while its next launch is currently planned from Vandenberg Air Force Base, California, USA, next month.
Delta 4型重型运载火箭之后又成功完成了更多次的运载任务，目前它的下一次发射定于下个月在美国加州Vandenberg空军基地进行。
The paper expatiates on the reason of unbalanced magnetic motive force and its preventive measures for asynchronous motor with multipath extended delta connection.
本文阐述了三相异步电动机延边三角形接法多路并联进线时磁动势不平衡的原因，并提出了相应的预防措施。
DELTA Information Centre For Natural Organic Compouds has higher technical force, advanced technical compence, vast world channels, economic strength and good prestige.
DELTA天然有机化合物信息中心拥有先进技术水平，较强的技术实力和经济实力、有着广泛的世界渠道和良好的信誉。
DELTA Information Centre For Natural Organic Compouds has higher technical force, advanced technical compence, vast world channels, economic strength and good prestige.
DELTA天然有机化合物信息中心拥有先进技术水平，较强的技术实力和经济实力、有着广泛的世界渠道和良好的信誉。
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