Chromatogram double sealing liquid advances appearance bottle

Chromatogram double sealing liquid advances appearance bottle has the advancing of bottle screw (1) appearance bottle (2), sets up inner cup (3) and enclosing cover (4), and inner cup (3) set up inner cup internal thread (5) and inner cup external screw thread (6), and pinhole (7) are seted up at inner cup (3) top, and inside has dottle pin (8), and enclosing cover (4) set up enclosing cover internal thread (9). Bottle screw (1) closely cooperates with inner cup internal thread (5), forms the first layer confined space who advances appearance bottle (2), inner cup (3) and dottle pin (8) constitution. Enclosing cover internal thread (9) closely cooperate with inner cup external screw thread (6), form the airtight space of the second floor of advancing appearance bottle (2), inner cup (3) and enclosing cover (4) constitution. Enclosing cover (4) are taken off before advancing appearance to the chromatogram, and syringe leaves the seam eye when advancing kind on dottle pin (8), cover closely enclosing cover (4)