There were some difference on fast closure, slow closure and total closure, but there were no statistically significant difference.
两组较快闭合、迟缓闭合和总闭合虽有差别，但无统计学意义。
Therefore, the valves are the new high performance energy-saving check valves with all strong points of Triple Eccentric Hard Sealing Butterfly Valves and Normal Slow Closure Type Check Valves.
本阀一种集三偏心硬密封蝶阀和常规缓闭止回阀所有优点于一身的新型高效节能止回阀。
The short cracks deflect more severe in coarse grain structure than in fine grain one, result in roughness induced crack closure effect, therefore exhibit slow crack growth rate.
粗晶组织比细晶组织的裂纹偏折更大，粗糙度诱发闭合效应更强，因而裂纹扩展较幔。
The closure of hydrocarbon consistency acted an important role to slow d…
烃浓度封闭对阻滞煤层甲烷的扩散散失起了重要的作用。
The closure of hydrocarbon consistency acted an important role to slow d…
烃浓度封闭对阻滞煤层甲烷的扩散散失起了重要的作用。
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