L1990057 L2191706 L2191707 L2191708 L2191709 L2191710 L2191711 L2191712 L2191713 L2191714 L2191715 L2191716 L2191717 L2191718 L2191719 L2191720 L2191721 L2191722 L2191723 L2191724 L2191725 L2191726 L2191727 L2191728 L2191729 L2191730 L2191731 L2191732 L2191733 L2191734 L2191735 L2191736 L2191737 L2191738 L2191739 L2191740 L2191741 L2191742 L2191743 L2191744 L2191745 L2191746 VT18光电开关，具有背景屏蔽（BGB）漫反射式光电开关功能，有如下特点：
红外光源
可调校的背景遮蔽功能
坚固的塑料外壳
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