balance sash 中文意思是什麼
balance sash
解釋
平衡式窗扇-
2 counter balance system shall have a single weight, pulley, cable, counter balance system which prevents sash tilting and permits one finger operation at any point along full width pull
平衡系統有砝碼、滑輪、鉸鏈等裝置。平衡系統可以阻止移門傾斜,並且可用一隻手操控。
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