Often at home you want to hang for drying items that cannot be secured with pin (for example, snails tiered photoback). Succeed with a string tied to nails or sticks out in any hole and are turned down, they will securely hold the most “inconvenient” objects.
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allows you to quickly verify the health of the quartz resonators. Diagram of the device consists of a generator (T1), detector (D1, D2) and DC amplifier (T2). By connecting the quartz to...
