  Some experimental results on nuclear transparency effect in pC- and
dC-interaction at 4.2 A GeV/c (JINR Dubna) are presented. The "half angle"
({\theta}1/2) technique was used and the particles with emission angle greater
and less than {\theta}1/2 are considered separately. The results of the
experimental study have been compared with the simulation data coming from the
Dubna Cascade model. The values of average multiplicity, average momentum, and
average transverse momentum of charged pions and protons are analyzed as a
function of the number of identified protons in an event. We observed some
behaviors for the data which could be considered as some nuclear transparency
effects. The lasts have been divided into three main groups depending on their
probable behavior: leading effect; cascade effect; medium effect.
