正投屏幕还有电动和红外线遥控电动幕，其机械构造要求更严谨，日本名牌OS手动屏幕有慢柔回卷(Soft Winding)和钢珠定位(Ball Stop)两项专利设计，它收起时象电动幕般徐徐回升，拉下来时手感非常轻巧，而且可以随意定位，效果相当好。
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When the painting had been placed on the warm cashmere and the soft silk had met the fluency lines, arts suddenly turned into sort of winding around neck.
丝绸的柔软与线条的流畅相交融汇，羊绒的温暖与画面的密织交错结合，于是，艺术摇身一变，从远观欣赏成为颈间缠绕。
Winding undulating mountains lying still with soft outline is clearly visible in the twilight;
逶迤起伏的山岭静卧着，柔和的轮廓在暮色中清晰可见；
It is composed of a primary winding, secondary winding and core of soft iron.
点火线圈有初级线圈、次级线圈和铁芯组成。
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