The up jarring section takes use of hydraulic mechanism, the jarring force can be adjusted according to up elevating load but can not exceed the max. load for tool load rated.

上击器采用液压原理，其震击力可由上提力的大小自由调节，但使用时不允许超过工具限定的最大负荷。

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"Not only is this Microsoft's largest patch load on record, but 23 of the vulnerabilities are rated at the most severe level, " he added.

BBC: Two million US PCs recruited to botnets