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| argon-injection through tundish stopper rod; injecting argon down tundish stopper rod | |||
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| argon-injection down tundish stopper rod (【技】采用浸人式水口进行保护浇注时，易吸人空气，产生二次氧化，导致水口堵塞。通过中间包塞棒吹氩，在浸人式水口内形成正压，可有效防止空气吸人，使浸人式水口保持畅通，铸坯质量得以提高。) | |||
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