未熔合    lack of fusion/ incomplete fusion

层状偏析    lamellar segregation

层状撕裂    lamellar tearing

搭接焊    lap welding

激光钎焊    laser brazing (soldering)

激光焊机    laser welding equipment

激光焊    laser welding/ laser beam welding

条状铁素体    lath ferrite

板条马氏体    lath martensite

左焊法    leftward welding forehand welding

焊脚    leg/ fillet weld leg

里海裂纹试验    Lehigh restraint cracking test

界面波长    length of the interfacial wave

平面锁缝接头    lick side seam joint; flat lock seam joint

光束钎焊    light soldering (brazing)

钛钙型焊条    lime titania type electrode

线热源    linear heat source

液化裂纹    liquation crack

钎料熔析    liquation of filler metal

液晶检验    liquid crystal test

局部干式水下焊    local dry underwater welding

局部消除应力    local stress relieving

锁底对接接头    lock butt joint

锁缝角接接头    lock corner joint; corner double seam

切割线    lone of cut/ cut line

长渣    long slag

纵向裂纹    longitudinal crack

纵向焊缝    longitudinal weld

焊道纵向弯曲试验    longitudinal-bead test

低氢型焊条    low hydrogen type electrode

低氢型焊剂    low hydrogen type flux

低毒焊剂    low poison flux

低压乙炔发生器    low pressure acetylene generator

低温钢焊条    low temperature steel electrode/ steel electrode for low temperature

温差拉伸消除应力    low temperature stress relieving

小电流等离子弧焊    low-current plasma arc welding

低尘低毒焊条    low-fume and harmfulless electrode/