base sand

基本解釋

Shanghai Shibang has become a major production and export base of sand-stone and powder-making machinery in China.
上海世邦已成為國內(nèi)主要的砂石、制粉機械生產(chǎn)和出口基地。
As the electric crawler inches forward along a sand base layer, the bricks are automatically packed together by gravity.
隨著這個電動鋪路者在砂基路面上一點點向前行進，磚塊便因為地心引力自動碼放在一起。
The effect of surface treatment of non silica base sand on the strength, gas evolution and breakdown of precoated sands has been investigated in the present work.
研究了表面處理工藝對覆膜特種砂強度、發(fā)氣性及潰散性的影響；