1·The term "sailing vessel" means any vessel under sail provided that propelling machinery, if fitted, is not being used.
“帆船”一词，指任何使帆的船舶，如果装有推进器但不在使用。
2·There is generally an advantage in being able to keep propelling machinery as far aft as a large gear box restricts possible, but this positioning.
一般来说，使推进装置尽可能远离舰尾是有利的，但是这样布置会受到大齿轮箱的限制。
3·It features quick control response, high accuracy, good stability and wide scope of adaption. It will be widely applied in self-propelling type machinery.
它本身具有控制响应快、精度高、稳定性好、适应范围大等优点，在行走式机械上将会得到广泛地应用。