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1世界水泥工业的起源及其发展进程世界水泥工业的起源可以追溯到十九世纪初叶,最早是由类似烧石灰的“土堆窑”演变来的。1820年前后
1 The origin and development of the world’s cement industry The origins of the world’s cement industry date back to the early 19th century and were first evolved from “burnt kilns” like burnt lime. Around 1820