加些水盖过核桃仁。
以水为萃取剂，提取不同方法干燥的核桃外果皮中棕褐色色素，并对其稳定性进行了测试。
Use water to distill the Dark Brown Pigment in the differently dried walnut epicarp. We have tested the stability of the dark brown pigment.
请提供我们一些成功的案例，请向我们提供至少两家油田的水特征对比报告，两家油田要使用过你方的核桃过滤器。
Please provide us some successful cases, and provide us water characteristic contrast reports of at least two oilfields that had used your nutshell filters.
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