▎ 摘　　要

NOVELTY - Solenoid injection system operating in sequence of blocking voltage, stopping a solenoid valve module (7110), stopping a piston module (7130), closing a needle (7140), and stopping a gas jet, is claimed. USE - The system is useful in graphene grown substrate producing device for producing graphene grown substrate non-catalytically. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of the solenoid injection system. Solenoid valve module (7110) Piston module (7130) Needle (7140)