科学家们在一块六英里见方的试验田内进行了勘测，他们发现那些有机碳来自筑造防洪大堤取土用的浅塘，有机碳化合物沉淀至塘底并慢慢渗入地下。
Using a six-square-mile test plot, they found that the organic carbon comes from shallow ponds that were dug to provide soil for flood protection.
主营油开关、米表齿总成，公司位于中国浙江瑞安市浙江省瑞安市塘下镇韩田工业区。
Main oil switch, meter gear assembly, company is located in China's Zhejiang Ruian city in Zhejiang province Ruian city Tangxia Town, South Industrial zone.
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