KSH 253201 KSH 163044
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Holographic diffraction grating 36x38mm 600 lines 1mm grates Optical teaching experiment Transmission grating No shell
Bluetooth Adapter USB Bluetooth 5.4 5.3 for PC Dongle Adaptador Wireless Mouse Keyborad Music Audio Receiver USB Transmitter
Fresnel lens Infrared induction 100° induction angle 7M distance PIR lens high sensitivity Infrared sensing of human body
HT106 HT107 Socket Tester Pro Voltage Test Digital Outlet Socket Detect US/UK/EU Plug Ground Zero Line Plug Polarity Phase Check