The V-P-O catalyst for oxidation of n-butane to maleic anhydride was prepared. High yield of maleic anhydride was obtained over the catalyst under suitable reaction conditions.
研制的V - P - O型固定床丁烷氧化制顺酐催化剂，在一定的反应条件下，可得到较高的顺酐收率。
Furthermore, the P-S-N curves of D type V belt are plotted and the distribution of limit stress are deduced.
还根据所得寿命分布作出了D型V带的P-S-N曲线，并据此推断出极限应力的分布规律可以用威布尔分布或正态分布描述。
Furthermore, the P-S-N curves of D type V belt are plotted and the distribution of limit stress are deduced.
还根据所得寿命分布作出了D型V带的P-S-N曲线，并据此推断出极限应力的分布规律可以用威布尔分布或正态分布描述。
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