If you changed, it will rust again. 螺栓锈

来源: webuser1 于 2017-08-17 16:26:34 [] [旧帖] [给我悄悄话] 阅读数 : (119 bytes)
回答: 请教:马桶水缸里的螺栓锈了, 由 桃花好运 于 2017-08-17 12:30:52

It's natual.  Unless you change to stainless steel parts.  It also rusted after certain years.

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