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| 塔式起重机的主塔; 吊机塔中柱; 承重柱 | |||
| 塔式起重机的主塔 | |||
| 主塔塔式起重机 | |||
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| 起重机的主塔 | |||
| 塔式起重机的主塔; 中支柱; 塔式起重机的主塔; 承重柱; 吊机塔中柱 | |||
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