spiral-staircase coil是什么意思，spiral-staircase coil的翻译，spiral-staircase coil音标、读音、用法和例句_开心英文字典

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spiral-staircase coil是什么意思，spiral-staircase coil的翻译，spiral-staircase coil音标、读音、用法和例句_开心英文字典_柠咚词