单词：fixed bed
fixed bed的用法和样例：
例句
- The stationary bed consists of an inert support impregnated with the partitioning liquid.固定床是由浸透着分配液的惰性液体所构成。
- Nitrate nitrogen removal from ground water by autotrophic denitrification in a packed bed reactor.固定床自养反硝化去除地下水中的硝酸盐氮。
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