The colorful road brick business which is mostly made from harddrying concrete has wide market development prospect.
以干硬性混凝土为主料的彩色路面砖行业具有广阔的市场发展前景。
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One said to the other, "Look at that farmer. I feel very sorry for him. He works so hard in the field, but now it is drying up. I wish I might help him."
Developed and studied drying technique which used hot water as a heat conduction medium drying north hard broadleaf timber, analysed and compared its economic benefit.