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Remove the o-ring and the protective
net from the removed TW300 for
reuse. You can remove the protective
net by hooking it with tweezers. (We
recommend you to wear clean
gloves.)
If it is difficult for you to remove the
protective net, try to hook the fringe of
it. ( Put a sheet of paper or like that on
the contact surface with o-ring not to
scratch or injure.
Remove the protective net.