x
uploads/river sand.jpg

river sand 河沙。

river wall

This research will try to resolve the distribution and controlling factors of gas layers by the study of division of substrata in bawu gas field . the main reservoir of bawu gas field are the sand layers in the formation of k1sh , k1y , k1d , k2q , sediment delta plane , delta frontier , plait delta developing distributary riverway sand , bayou sand dam , far sand dam and river sand of plait 八屋氣田主要儲層為早白堊世的沙河子組( k _ 1sh ) 、營城組( k _ 1y ) 、登婁庫組( k _ 1d )及晚白堊世的泉頭組( k _ 2q ) ,為三角洲平原、三角洲前緣及辮狀河三角洲沉積體系,發育分流河道砂、河口砂壩、遠砂壩、辮狀河道砂等,砂層在平面上連通性差。

With the development of basic construction in our country , people pay more and more attention to the serious short of sand . the problem of transportation and time can be solved by producing hill sand in regions with abundant resource which can also lower cost and save river sand 隨著我國基本建設的發展,各地砂源緊缺問題凸顯,人們對山砂的應用日益重視,對具有豐富山砂資源的區域,生產山砂可以解決運輸、時間上的問題,降低成本,節省資源。

Aiming at the factors affecting the strength of paste filling material , the relation between affecting factors and strength of paste filling material is revealed on the basis of a lot of experiments in the lab , in which the river sand was used as skeletal material 摘要針對影響膏體充填材料強度的因素,通過大量的試驗,揭示了以河砂為骨料的膏體充填材料強度與各影響因素間的關系。

The best substrate for broom is river sand , followed by mountain soil and perlite . the time and humidity are the other two factors studied 扦插基質也影響生根率,結果表明,金雀花扦插以河砂為基質效果最好,山泥次之,珍珠巖效果最差。

While working in the shadow of the iron bridge , he tried his luck by dipping a pan into the river sand 當他在鐵橋下陰涼處干活時,隨手把淘金盤浸入河沙中淘了淘,想碰碰運氣。

They hold river sand , pieces of iron and wood charcoal 在一段很長的時期內,毒井中的水可能會導致致命的癌癥。

They hold river sand , pieces of iron and wood charcoal 他們裝設有水沙子,鐵片和木炭。