等外的英文：
offgrade
overgauge

参考例句：

As substandard goods will not sell well in the domestic market,they shall be market exclusively by you at reduce price.
因等外产品在国内销售有困难，应采取折价的办法由贵方包销。

offgrade是什么意思：
等外(的)
不合格(的)
低级的
overgauge是什么意思：
等外; 正偏差