hardening pipe special furnace hot iron crane |
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| navigate by keyword : hardening heat pipe form metal crane overhead steel iron cast furnace blast manufacturing working calcinating cylinder ingot foundry efficiency tempering alloy heavy workshop safety protection occupation machinery shiny preparation indoors industry factory man worker helmet skill accuracy burning metalwork temperature equipment control strength hardness toughness gantry clamp flame hardhat hook |
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| Hardening of pipe in special furnace, hot iron pipe on crane. |
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