เครื่องวัดแสง Heavy Duty Light Meter รุ่น EXTECH 407026 - บริษัท อีสต์เทิร์น เอ็นเนอร์ยี่ จำกัด
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Extech SDL400: Light Meter Datalogger
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EXTECH LT40 LED Light Meter
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Extech 407113 Heavy Duty CFM Metal Vane Anemometer,
