英语词汇permanent opening怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	permanent opening
释义	permanent opening 简明释义永久开口网络释义 1 ?永久巷道永久巷道: main working; permanent openings; perm.. 双语例句 1 The supporting of permanent openings has been a difficult problem in production and technique for many years. 永久洞室的支护方法，多年来一直是松软岩层矿井生产的技术难关。 2 For this reason, the greatest possible openings are formed and are combined with both permanent and folding sunshades. 出于这个原因，最大可能的开口形成和常任理事国和折叠遮阳篷结合。
随便看	post indexing post indexing operation post indicator valve postinduction postindustrial post-industrial postindustrial post-industrial city postindustrialism postindustrialism postindustrialism postindustrialite post industrialized society post - industrial society post industrial society postindustrial society post-industrial society postindustrial state post inertia dyskinesia post-inertia dyskinesia postinfarcted postinfarction post-infarction post-infarctional angina pectoris postinfarction angina pectoris

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