| 1. | Material illustrating detailed structure of graptolites has been etched from limestone by means of hydrofluoric acid .
表明笔石详细构造的物质是利用氢氟酸从石灰岩中侵蚀出来。
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| 2. | Subject to mild attack by aqua and or hydrofluoric acid
在王水和氢氟酸中稍有腐蚀
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| 3. | Chemical reagents . hydrofluoric acid
化学试剂氢氟酸
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| 4. | Aqueous hydrofluoric acid for industrial use . sampling and methods of test
工业用含水氢氟酸.取样和试验方法
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| 5. | A case of hydrofluoric acid poisoning treated by venous injecting of calcium gluconate
静脉补钙抢救氢氟酸中毒1例报告
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| 6. | Silica refractories - determination of silicon dioxide content - hydrofluoric acid gravimetric method
氢氟酸重量法测定二氧化硅量
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| 7. | Chemical analysis of silica refractories - part 3 : determination of silicon dioxide - hydrofluoric acid gravimetric method
硅质耐火材料化学分析方法第3部分：氢氟酸重量法测定二氧化硅量
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| 8. | It is insoluble in water and acid , but dissolves in caustic soda and hydrofluoric acid without separation under high temperature
不溶于水及酸，深于苛性钠、氢氟酸，受高温不分解。
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| 9. | Before any monel part is assembled into a hydrofluoric acid valve it is acid tested to assure that it is monel
在将任何蒙乃尔部件组装进氢氟酸阀门之前，都经过酸性检测，以确保确实是蒙乃尔材料。
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| 10. | We test our hydrofluoric acid valves at extended time periods that further assure the quality of the valve performance
我们加长了检测我们的氢氟酸阀门的时间段，这样就进一步保证了阀门性能的质量。
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