Drugs are dumped out of propeller planes or unloaded from ships just off the coast of Guinea, Guinea-Bissau, or Sierra Leone, and then broken into smaller parcels to be shipped north.
毒品或用螺旋桨飞机，或用轮船送到几内亚，几内亚比绍，或者塞拉利昂的海岸，在那里分成小包装运到北方。
The propeller of the plane is out of order, and is under repair.
这架飞机的螺旋桨出了点问题，正在维修。
A new propeller model open - water test was carried out in the decompressible towing tank .
本文介绍了在减压拖曳水池中最新开发的桨模敞水试验技术。
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