KEY younger with air hole 2 hole through which the test diameter of not less than 5 mm can be inserted through in a symmetrical position on the keyboard by the center of the room the two were separated by no less than 15 mm Merapi, and the edge. True, but you know to stay away from the keyboard Minot than 5 mm in case of room air over two holes to have a room air at least two holes, according to the regulations set out above
, the test shall be performed by inspectors. Observation and Measurement Instruments measurement resolution to 0.5 mm.
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