The paper analyses for design of the old type of BOP and presents some problems of it in field application by using CAD soft ware to design a modified BOP avoiding shortage of former one.
对旧式防喷盒的设计缺陷进行分析，并指出实际应用中存在的问题。应用CAD软件设计制作的改进型防喷盒克服了原设计的不足。
The paper analyses for design of the old type of BOP and presents some problems of it in field application by using CAD soft ware to design a modified BOP avoiding shortage of former one.
对旧式防喷盒的设计缺陷进行分析，并指出实际应用中存在的问题。应用CAD软件设计制作的改进型防喷盒克服了原设计的不足。
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