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… special instructions. 563. Clearing Opposing Signals Into Non-Signalled Sidings (a) When two opposing train(s) or transfer(s) are to be lined into the same non-signalled siding, each locomotive engineer must be …
78.944
… is governed by the chemical principle on which a detector tube is manufactured. Obviously, if the substance … the error on the concentration value obtained using a detector tube can be as low as 5% or as high as 50%. …
2.202