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50KG device can be both positive and negative arm strength to do all 50 in one breath, why is the ne

Takeo rock2010-02-19 16:10:09 +0000 #1
Above. Thank you to answer!
xumeng_232010-02-19 16:14:08 +0000 #2
First, because of the new hard, need for running-in look. 2, 60KG than 50KG also a bit too heavy, have to adapt to.

Your 50's may be old, easy to use, the new are hard
SESHUIDAOREN2010-02-19 16:30:06 +0000 #3
more try

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