Constant Calculation eliminates the need to re-enter the constant when doing repeated calculations. Chain Calculation allows the previous result to be used in the next calculation step without having to re-enter it.
Constant Calculation
Chain Calculation
EL-510R
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EL-531RH, EL-509RH, EL-531R, EL-509R
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EL-531RH (BL/GR)
EL-520R
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EL-506R/EL-546R
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EL-500L
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EL-530L