光开关，光纤排列构件，它们的制造方法，以及光纤的排列方法。
Optical switch, optical fiber arrangement member, their manufacturing method, and optical fiber arranging method.
水位检测装置，该水位检测装置包括：设置于浮 标和浮标杆之间，用于调节浮标杆和微型开关接触的时间的缓冲构件；
Water level detecting apparatus, comprising buffer member for adjusting contact time of the float bar and micro-switch, which is located between float and float bar;
它具有优异的电绝缘、阻燃、耐电弧等特性，可用作开关柜隔板及加工成各类绝缘结构件。
It has excellent electrical insulation property, flame retardant, arc resistance, suitable for clapboard of switch cabinet and can be machined to all kinds of insulating structural parts.
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