Bulk Handling Global
		Bulk solids and powder flow properties testing, silo and hopper design, discharge and conveyor technology
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	Hopper valley angle calculation
		Inputs
			Internal angle Wall "A" to vertical α1					Degrees
			Internal angle Wall "B" to vertical α2					Degrees
		Note - Type in respective value inside of coloured cell above, then click outside cell to enter.
		Results
			Internal Valley angle to vertical α3 =					Degrees
			External angle to horizontal α4 =					Degrees