000
00247nam a2200109Ia 4500
008
220201s1982 xx 000 0 eng d
100
_a
Marfels, W
245
0
_a
Gas & are welding
260
_b
New Delhi: Wiley
_c
1982
300
_a
87
942
_2
ddc
999
_c
85706
_d
85706