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Devices on the issue of arm strength

chi77582010-02-09 23:01:09 +0000 #1
strength of arm device

Some 60KG's I can

Some 40KG (new, the shop said that the new hard to get) there are problems.

How's going on
days of soul2010-02-09 23:12:08 +0000 #2
and that the top of the spring, 60kg already old, not so big a stretch.

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