此处的sand 是什么意思？不懂。。？ ....i find this very strange that china would have more strict rules about manufacturing than europe of the usa. so please explain in much more detail so i understand what this standard affects, and that it is really applicable to a hopper holding sand or some other non-dangerous material... 我发现这一点非常奇怪： 相比美标和欧标 ，中国对于制造有严格的规程。请更详细说明以例我能理解此标准的影响，并且采用加料斗盛装沙子或其它一些非危险物质是可行的。 不知这么处理是否可行，并请楼主确认 europe of the usa是不表达有误。。。 查看更多
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