pebble-bed shield是什么意思，pebble-bed shield的翻译，pebble-bed shield音标、读音、用法和例句

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pebble-bed shield是什么意思，pebble-bed shield的翻译，pebble-bed shield音标、读音、用法和例句_流逝汉英词典

pebble-bed shield

基本解释

专业释义

土木建筑工程