what is the use of filed itemconditon in condtiontype control

Hi gurus

In pricing condition types v/06 in pricing control fileds we have the field as item conditon as well we have same manual in the pricing procedure control fields what is the use of both

one is in condtion type controls another is the pricing procedcure controls of 16 fields in that we have the manual condition what is the use of having both.

Please any one help me in this regard

Thanks & Regards

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