断裂韧度    fracture toughness

自由变形    free deformation

低频电阻焊机    frequency converter resistance welding machine

摩擦压力    friction pressure/ heating pressure

摩擦表面    friction surface

摩擦时间    friction time

摩擦转矩    friction torque

摩擦焊    friction welding (FW)

正面角焊缝    front fillet weld/ fillet weld in normal shear

高真空电子束焊机    full vacuum electron beam welder

全波阻焊电源    full wave resistance welding power source

炉中钎焊    furnace brazing/ furnace soldering

熔炼焊剂    fused flux

保留垫板    fusible backing/ permanent backing

融合比    fusion ratio

熔透型等离子弧焊    fusion type plasma arc welding

熔接    fusion welding

母材熔化区    fusion zone