FEATURES – Locking journal Corduroy-covered 5.1 inch x 7.4 inch ,Replaceable paper lock diary,a ribbon bookmark, a leather pen loop and a sturdy password lock.Placed in a sturdy and beautiful box.

a, The depletion attraction potential between lock and key is proportional to the overlapping excluded volume ΔV, which attains a maximum ΔV max for the configuration in which the key particle ...