Nano-WO3 film is the better optical gas sensor material.

WO3薄膜是良好的光学气敏传感器材料。

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The results proved that nano structured Pd doped WO3 film has an excellent gasochromic property.

研究结果表明，纳米掺钯气致变色WO 3薄膜有着良好的气致变色特性。

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WO3 catalyst can be reused for 4 times and the isolated yield of adipic acid is still above 70%.

三氧化钨催化剂重复使用4次，己二酸的分离产率仍可达到70%以上。

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We add WO3 (usually from scheelite) to iron to make ferrotungsten, or V2O5 to iron to make ferrovanadium which we then add to the steel.

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