| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology of reducing possibility that a periphery gets dirty by a liquid due to a plug member.SOLUTION: A plug member 62 is detachably mounted on a liquid injection port to close the liquid injection port, and includes a seal part which closes the liquid injection port and is at least partially inserted inside the liquid injection port, and a cover part 644 arranged on at least a part of a periphery of the seal part.SELECTED DRAWING: Figure 5 |
