竹叶石为砾屑灰岩经风化与岩溶作用而形成的块石。
Bamboo stone for calcirudite by weathering and karstification and the formation of the stone.
本文叙述了用PTFE废弃边角屑料经辐射裂解，超微气流粉碎制备PTFE超细粉的工艺过程与应用范围。
This paper describes the preparation of ultrafine PTFE powder from the waste leftover bits and pieces of PTFE by radiation splitting and superfine airflow, as well as the application of the powder.
经适当预处理，湖南临澧玻屑凝灰岩可成为沸石分子筛的合成原料。
The vitric tuff of Linli in Hunan may become a qualified synthetic material of zeolite molecular sieve after it is pretreated adequate1y.
经适当预处理，湖南临澧玻屑凝灰岩可成为沸石分子筛的合成原料。
The vitric tuff of Linli in Hunan may become a qualified synthetic material of zeolite molecular sieve after it is pretreated adequate1y.
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