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Screwfix Direct Limited, trading as Screwfix, is a retailer of trade tools, accessories and hardware products based in the United Kingdom. [6] Founded in 1979 as the Woodscrew Supply Company, the company was acquired in July 1999 by Kingfisher plc , which also owns B&Q , and is listed on the London Stock Exchange .
A remote panel for routing video feeds on a Pro-bel video matrix. Many types of broadcast automation systems can be used to control a video router via IP or serial communications such as RS-422. Video routers can also be controlled by other types of user interfaces, including front panel buttons, IR remote control, or application software ...
[1] [2] Other names for the tool include adjustable square, combo square, and sliding square. The most common head is the standard head, which is used as a square for marking and testing 90° and 45° angles. [3] The other common types of head are the protractor head, and the centre finder head. [4]
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Both Bosch and cryogenic processes can fabricate 90° (truly vertical) walls, but often the walls are slightly tapered, e.g. 88° ("reentrant") or 92° ("retrograde"). Another mechanism is sidewall passivation: SiO x F y functional groups (which originate from sulphur hexafluoride and oxygen etch gases) condense on the sidewalls, and protect ...