Hadron bags and their interactions under the strict quark-line rule

The model of hadron bags under the assumption of strict quark-line rule has been developed. The reasonableness of the known nuclear force problems and the electromagnetic form factors of nucleons based on the phenomenological analysis is explained in conformity with the expected structure of nucleons. The reason of the successful spectroscopy of charmonium in referring to quarkonium states may also be understood from the similar standpoint