| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a bad influence of the air and to avoid troublesome air venting work as much as possible. SOLUTION: A protruding pipe 16 protrudes from an opening end 12a of an attaching portion 12, and an inlet opening 13 of the protruding pipe 16 is closable by a pushed and contracted bottom 3 of a cartridge 6. A distance between an end of a piston 24 and an outlet ball valve 26 is not greater than 1 mm. At a discharge position B, the end of the piston 24 forms a curved shape along a spherical surface of the outlet ball valve 26.</p> |
