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管材拉拔 (【技】使用有芯棒或无芯棒拔制法,将钢管直径和壁厚减缩到规定尺寸的加工过程。无芯棒拔制用于减小钢管外径,带芯棒拔制用于减壁和减径。) | |||
拔管 | |||
管材拉拔 | |||
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拔管; 管材拉拔 |
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