稀H 关键字: 覆铜板；无电镀镍金；化学浸银；稀H2SO4[gap=1589]rds: printed circuit board; electroless nickel immersion gold; immersion silver; dilute H2SO4
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The industrial crude fat was obtained by treatment of soybean lecithin with dilute H2SO4.
大豆油脚经稀硫酸预处理得工业酸油。
The use of 98% H2SO4 for removal of water in nitric acid in the sulphuric acid process concentrated nitric acid production will produce large amount of dilute sulphuric acid, which has to be treated.
稀硫酸腐蚀性强，硫酸法—浓硝酸工艺采用98%H2SO4脱除硝酸中的水，产生了大量的稀硫酸须予以处理。
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