F. P and A. P tank is single bottom structure.

艏，艉尖舱底部为单底结构。

youdao

Steel tugboat, single deck, single bottom, single hull, single engine, single oar and rudder, mid-engine, towed by offing ship.

钢质、单甲板、单底、单体、单机、单桨、单舵、中机型拖轮，近海船舶拖带。

youdao

Steel tugboat, single deck, single bottom, single hull, single engine, single oar and rudder, mid-engine, towed by offing ship.

钢质、单甲板、单底、单体、单机、单桨、单舵、中机型拖轮，近海船舶拖带。

youdao