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B&Q Limited (short for Block & Quayle after the company's two founders) is a British multinational DIY and home improvement retailing company, with headquarters in Eastleigh, England. It is a wholly owned subsidiary of Kingfisher plc .
Common substrates are paper, cloth, vulcanized fiber, and plastic films and come in grit sizes range from very coarse (≈2 mm) to ultrafine (submicrometre). The international standard for coated abrasives is ISO 6344. Sandpaper and emery cloth are coated abrasives for hand use, usually non-precision. Other coated abrasive forms include sanding ...
Q-meter E9-4. Internally, a minimal Q meter consists of a tuneable RF generator with a very low (pass) impedance output and a detector with a very high impedance input. There is usually provision to add a calibrated amount of high Q capacitance across the component under test to allow inductors to be measured in isolation.