If handy, you can open up two covers on the top, even it said...

来源: 老金工 于 2019-09-07 10:08:10 [] [旧帖] [给我悄悄话] 阅读数 : (70 bytes)
本帖于 2019-09-07 10:09:02 时间, 由普通用户 老金工 编辑

"maintenance free". Acid inside, be very careful!

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