However , with heavy hydration a large amount of Al _ 2 O _ 3· nH _ 2 O may block the pores.
深度水化,由于有大量的水化产物Al_2O_3·nH_2O析出而使催化剂微孔堵塞.
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A variety of schemes to either block up or seal off the blowout preventer are in development.
各种各样的计划,要么堵塞要么封闭防喷器的发展。
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The distribution gutter should be regularly cleaned to prevent blockages and ensure proper drainage.
配水槽应定期清洁,以防止堵塞并确保正常排水。
dict.jiandongshicai.cn
目前居民住宅小区的楼房垃圾通道没有统一标准,经常发生堵塞现象,污染了环境。
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