self closing box for sale, brand-new and used.

DIY Kit Secohmmeter Capacitance Meter Frequency Meter Inductance/Capacitance

New Combustible Gas Leak Detector Tester Methane Propane Natural Gas DY8800A+ Descriptions: This DY8800A+ detector is suitable for gas pipeline, propane refilling station, ship hold oil leakage check, service outlet safety, indoor air inspection, waste gas and fuel oil leakage, heat exchanger leakage, combustion residue check, place with flammable gas, fog and remnant. Features: Adjustable High sensitive Ergonomic mold for nice handheld touching, s

i000000 New Transistor Tester Detect IC Tester Meter Maintenance Tester MOS PNP NPN

I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806

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1Hz - 100KHz Pulse Signal Generator PWM Module Servo Signal Duty Cycle 1 ~ 99%

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