untreated felt是什么意思

用法例句

Research on variations of asphalt felt roof runoff pollutant concentrations during the rainfall;

沥青油毡屋面降雨径流污染物浓度历时变化研究

Cause and repair of seepage of roofage of asphalt felt;

沥青油毡屋面渗漏的原因分析及维修方法

The asphalt paper traditionally used in waterproof rolls as main material is facing elimination.

传统防水卷材中作为主角的纸胎油毡面临淘汰,新型防水卷材的开发和应用是世界建筑业的发展趋势。

Comparison of asphalt shingle cutting equipment;

沥青油毡瓦切割设备分析

Development of continuously roll -splitting asphalt shingle production line;

连续辊切式油毡瓦生产线的开发