rough sand

基本解释

Rough filtration and slow sand filtration is suitable for water purification of water plant in rural area.
粗滤慢滤组合净水工艺适用于乡村小水厂。
Stainless steel tube surface after sand blasting become rough and very evenly, can enhance the paint adhesion layer on the surface of stainless steel pipe.
不锈钢管表面经过喷砂变得粗糙又很均匀，能增强油漆层对不锈钢管表面的附着力。
I came to a stone where the highway branches off on to the moor at your left hand; a rough sand pillar, with the letters W.H. cut on its north side, on the east, G., and on the south-west, T.G.
我来到有一块大石头的地方，那儿大路岔开，左手一边通到荒野，有一根粗糙的沙柱，北面刻着W．H．，东面是G．，西南面是T．G．①。
putclub.com

The inflatable skirt keeps the cart 9 inches off the ground, letting you float over rough, sand and ponds.
FORBES: Just Like Bubba Watson, You Too Can Own A Hover Golf Cart
Andrew Ledford against court-martial charges that he allowed his men to beat Jamadi, says the CIA did ask the SEALS to rough up detainees at the sand pit.
NPR: Q & A: The CIA's Record on Detainee Treatment
What was once sand or native grasses became fairway or very friendly short rough, to the point where there was a sea of green as far as the eye could see.
FORBES: The Biggest "New" Golf Course Opening of 2011?