n.航路標(biāo)志燈船；燈塔船
It is a vitally important task to achieve control of the weight and center of gravity of lightship during building a new ship. 燈塔船在其建造的過(guò)程之中,其重量與重心的控制是一門(mén)非常重要的學(xué)問(wèn)。
