double casement window
双开窗
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Typically Bay window is consisted of three Windows joined together. The center window is usually fixed, with operating double-hung or casement Windows at the sides.
典型的弓型窗是由三扇窗组合而成。中间为固定窗，两侧为提拉窗或平开窗。
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