For the first time industrial waste, such as ash from the soap-boilers, was collected in the cities and sold in the country as artificial fertilizer.
工业废料，如煮皂炉里的灰，第一次开始在城市里被收集，作为人工肥料在农村出售。
2
For the first time industrial waste, such as ash from the soap-boilers, wascollected in the cities and sold in the country as artificial fertilizer.
城市首次收集工业废料， ， 比如煮皂的灰料和城市废料，并作为人工肥料售给乡下。
3
We can use whiteness instrument to measuring the color of soap base. It is proved by experiments that the method is easy and fast. It is valuable for industrial application.