?平纵接缝,平纵缘    flat seam

?平滑阀    flat slide valve

?平钢,扁钢    flat steel

?平阀    flat valve

?平焊    flat welding

?平面度    flatness

?平锤    flattening hammer (or iron)

?压平试验,压扁试验    flattening test

?压扁试验    flattening test

?贯层方向    flatwise

?瑕疪,裂隙    flaw

?探伤器,探疪器    flaw detector

?舰队,船队    fleet

?变换角度补偿器    fleet angle compensator

?佛[来纳]氏舵    Flettner‘s (or tripple) rudder

?柔性,柔度    flexibility

?柔度矩阵(结构分析)    flexibility matrix

?柔性轴承    flexible bearing

?挠性轴承    flexible bearing

?柔性缆,柔性电缆    flexible cable (or cord)

?软管    flexible conduit

?挠性联结器    flexible coupling

?柔性联结器    flexible coupling (or joint)

?弹性制造系统    flexible manufacturings system (FMS)

?防振衬垫    flexible mounting

?挠性管    flexible pipe

?挠性轴    flexible shaft

?柔性轴    flexible shaft

?柔性钢索    flexible steel wire rope

?柔性导波装置    flexible wave guide

?抗挠刚度,抗弯刚度    flexural rigidity

?飞行甲板(航舰)    flight deck

?校磁铁棒    flinder‘s bar

?正反系统    flip-flap system

?浮子,筏    float (or floate)

?浮式计    float gauge

?浮动液位计    float level gauge

?浮[动]环    float ring

?浮扣阱    float trap

?浮式流速仪    float type flow meter

?浮子水位指示器    float water level indicator

?自由浮离下水    float-free launching