Manual article review is required for this article
Manual article review is required for this article
Manual article review is required for this article
substitution, commutation, exchange - the act of Placing one thing or human being inside the put of another: "he sent Smith in for Jones but the substitution arrived also late to help"replacement - an event wherein one thing is substituted for another; "the replacement of shed blood by a transfusion of donor blood"the nuts and bolts the practical f