Some are tethered to ships, whereas others are cast free to operate like miniature submarines, although these too need the services of a support vessel.

有一些与船只绑定，另一些则如同微型潜水艇一样自由航行，但也是需要有供给船只服务的。

youdao

For the internal parts specified in Vessel Standard such as lugs and support rings, corrosion allowance shall conform to the stipulations in it.

容器标准中规定的内件，如耳轴及支撑环的腐蚀余度应符合标准中的规定。

youdao

Materials for external attachments and vessel support welded directly to the pressure retaining parts shall be similar material as the pressure parts.

直接焊接到压力保持部件上的外部配件及容器支架的材料应与压力部件相同。

youdao

A U.S.military support vessel with medical personnel on board has also been dispatched to the site.

VOA: standard.2009.09.06

The Super Puma EC 225 was taken ashore by the support vessel Olympic Zeus.

BBC: Ditched Super Puma pilots 'feared gearbox problem'

The eight bodies were recovered from the water by the support vessel, Caledonia Victory.

BBC: 'No hope' of helicopter survivors

The crew of a support vessel saw the crash and sent a boat out but only wreckage was found.

BBC: 'No hope' of helicopter survivors