| 摘要 |
A trunk injection needle includes: a front part which is conical, a middle part which is cylindrical, and a rear part which is cylindrical, which are respectively provided along a needle axis; wherein an outer diameter of the rear part is larger than outer diameters of the front part and the middle part; the front part has a bits guiding hole extending along the needle axis, and the rear part has a drug feeding hole extending along the needle axis; wherein the middle part has two outlet holes extending along a radical direction, and a separating board is provided between the two outlet holes; a rear end of the bits guiding hole communicates with the two outlet holes at two sides of the separating board; and a front end of the drug feeding hole communicates with the two outlet holes. |
