| 摘要 |
A concealed shackle padlock includes a shackle having a first straight protecting tube sleeved on the fixed end thereof, a second straight protecting tube removably sleeved on the free end of the shackle and connected to the casing of the padlock by a chain, and an arched protecting tube sleeved on the arched middle part of the shackle. By way of the protection of the first and second straight protecting tube, and the arched protecting tube, it is nearly impossible to open the padlock with bolt cutters, hacksaws or jimmying tools.
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