| 摘要 |
PROBLEM TO BE SOLVED: To provide a writing implement which can change two or more writing-cores quickly and calmly. SOLUTION: The fixed multi-color ball point pen comprises as follows. Two or more writing-cores (2) are inserted in a writing shaft (1). At this time, the writing point of each of writing-cores (2) is all arranged to be exposed to write. COPYRIGHT: (C)2010,JPO&INPIT |
