Objective: To evaluate the influence of denture material and its surface roughness on retention of upper complete denture .
目的：评价全口义齿基托材料及其表面粗糙度对义齿固位的影响。
2
It was concluded that surface mulching in the form of stubble retention and vegetative coverage is more important than any other management option in improving infiltration.
结果表明，就提高渗透而言，以残茬保留及植被覆盖形式的表面覆盖比任何其他管理措施更重要。
3
In paper making chitosan can be used as fortifier sizing agent retention and filtration aid surface modifier and flocculation agent for paper-making effluent.