辅助救助拖船 rescue auxliary tug

救助拖船救助拖轮 rescue tug ; salvage tug

专用救助拖船 dedicated salvage tug

救助拖船救助船 rescue tug

远洋救助拖船 deep-sea salvage tug ; sea salvage tug

海洋救助拖船 multi-function salvage tug ; ocean salvage tug

小型救助拖船 small rescue tug

救助打捞拖船 rescue and salvage tug ; salvage tug

辅助救生拖船 rescue tug auxiliaries