Set 2 Practice Mode

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Q10628
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What is copper, zinc, silver ratio composition of spelter for ferrous metal?
Q10629
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Which process is a similar to brazing but it gives a much stronger joint than the soldering?
Q10630
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What type of fuel used in hand forging?
Q10631
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What fuel used in blow lamp?
Q10632
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Which part of blow lamp used for filling fuel?