The sand is separated from the silt and clay by wave sorting . 砂粒在波浪分选作用下从粉砂及粘土中分出。
These may range from coarse silt to sand or pebble size . 这些颗粒的大小变化范围,从粗粉砂级到砂级或细砂级。
These particles range from coarse silt to sand or pebble size . 这些颗粒的大小变化范围是从粗粉砂级到砂级或细砂级。
This sandstone unit is commonly thick-bedded and massive, with silty and carbonaceous laminations . 该砂层单元通常为厚层或块状,具粉砂质和碳质纹层。
Stochastic analysis of sudden siltation of silty sand in open channels 开敞式航道粉砂骤淤的随机分析
Study on well completion techniques and capacity of screen like qiao type in silt strata 粉砂地层桥式滤水管的成井工艺与出水量研究
Salt dynamics in soil profiles under condition of different groundwater depths and salinities 地下水作用条件下粉砂壤土盐分动态研究
So it has the merits of lower price , liable quality , no slurry pollution , penetrating easily the silty and silty - sand layers , efficient construction etc 具有工程造价低,质量易于保证,无泥浆污染,能穿过粉土、粉砂层,施工速度快的优点。
The intercalations are divided into five types , such as muddy intercalation , silty intercalation , calcareous intercalation , marly intercalation , and gravel intercalation 夹层类型主要有泥岩夹层、粉砂质泥岩夹层、灰质夹层、泥灰质夹层和砾石质夹层5种。
Ore type primarily contains the copper sand scraps slilica rock or contain the copper gravel scraps silica rock , a little amount powder sand sericite callys type copper silver mine and dolomie type copper silver mine 矿石类型主要有含铜砂屑硅质岩或含铜砾屑硅质岩刑,少量粉砂质绢云母板岩型铜银矿石及白云岩型铜银矿石。