Novel multifunctional trunk puncher
The utility model discloses a novel multifunctional trunk puncher which comprises a puncher. The puncher adopts a hollow drill bit, the side opening of the drill bit is saw-toothed, a handle is mounted at the side opening of the drill bit, a spring is mounted in the drill bit, the spring is controll...
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Format: | Patent |
Sprache: | chi ; eng |
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