常古是一个汉语词语，拼音是cháng gǔ，意思是常法，旧法。
东莞市常古机电技术有限公司位于中国东莞、深圳。
Dongguan Chang ancient Electrical Technology Co., Ltd. located in Dongguan and Shenzhen.
“人的问题”是一个千古常新而又常做的永恒课题。
"The problem of man" is an eternal program that is done frequently through the ages.
中国东部古生界沉积—改造型铁矿床含矿岩系基本上由细碎屑—碳酸盐岩组成，而且常与富铁白云岩共生。
Ore-bearing rock formation mainly consists of fine clastic-carbonate rocks which are often associated with iron-rich dolomite.
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