这几个专业词句翻译---求助

李斌文

由于水平有限，下面的句子翻译不是很准确，求各位专家帮翻下，谢谢

１.钨极伸出长度
) c; i* T6 x( q5 k4 `２.不锈钢同材质焊接
３.低合金刚同材质焊接
４.异种钢焊接
( f& o# L& g- @% ]５.封底焊接时采用背氩保护

李斌文

各位大哥大姐帮下忙啊，急等着要，自己翻的不过关啊，谢谢了

Hydale

１.钨极伸出长度 Length of tungsten pole
2 g: h$ A) c; V. B. E0 ~( c２.不锈钢同材质焊接 Weld of stainless steel in same material
３.低合金刚同材质焊接 Weld of low-alloy steel in same material
& m% w: N+ ~8 y" H& H# d P４.异种钢焊接 Weld of fashion iron
* ~ V8 S! l( w５.封底焊接时采用背氩保护 Using argon protection when it was welding bottom for seal

养猪东篱下

1.tungsten electrode extension elongation
5 ]; \, D, F5 a8 N6 `# j H2.same material welding of stainless steel
) A2 f+ c6 f2 U8 Q, A3.same material welding of low alloyed steel
4.special steel welding
5.sealing welding with argon protection
, A$ ?, n7 e$ T+ F7 W+ `7 U
仅供参考.第5句的意思与原意稍有出入.