這幾個專業詞句翻譯---求助

李斌文

由于水平有限，下面的句子翻譯不是很準確，求各位專家幫翻下，謝謝
: U9 u- n5 e* A+ z1 I! w2 n
１.鎢極伸出長度
4 c: V4 z8 q/ B. c% n! |２.不銹鋼同材質焊接
３.低合金剛同材質焊接
４.異種鋼焊接
3 t! v+ k0 Y$ |7 r' J; F５.封底焊接時采用背氬保護

李斌文

各位大哥大姐幫下忙啊，急等著要，自己翻的不過關啊，謝謝了

Hydale

１.鎢極伸出長度            Length of tungsten pole
２.不銹鋼同材質焊接        Weld of stainless steel in same material
３.低合金剛同材質焊接      Weld of low-alloy steel in same material
４.異種鋼焊接              Weld of fashion iron
５.封底焊接時采用背氬保護  Using argon protection when it was welding bottom for seal

養豬東籬下

1.tungsten electrode extension elongation
2.same material welding of stainless steel
" C6 `' ^( F' e) Q9 Q: ]# d/ X3.same material welding of low alloyed steel
$ d  q' v. u& m& V5 M4.special steel welding
0 J2 ]0 O2 k% {' \) c& O" {; `5.sealing welding with argon protection
7 `% s; `- v% a! L" i
) C1 ]" s  {  W' U! L( E5 y僅供參考.第5句的意思與原意稍有出入.