E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
148/13, 148/43,
E21B 10/50 (2006.01) C21D 9/22 (2006.01) C23C 8/00 (2006.01)
Patent
CA 1003817
Dill Herbert C.
Scales Stanley R.
LandOfFree
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