单词：pinnoite
pinnoite的用法和样例：
例句
- According to the characteristics of pinnoite in Dachaidan, a new technology of preparing boric acid with two-step sulfuric acid method was studied.摘要针对大柴旦柱硼镁石矿特点，对酸法制硼酸进行了工艺优化研究。
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