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jan 1, 1937 - 巷道铺设成为全国趋势

Description:

巷道铺设已经成为全国趋势，混凝土铺设法进步是原因之一。（铺路一直延续到今天，表面上是为了改善城市外观，降低维护成本，方便垃圾清除，方便出入。）

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alley of American

7 Mar 2020

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Date:

jan 1, 1937

Now

~ 88 years ago

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