An unprecedented external demand shock, stemming from rare synchronous recessions in the developed world, devastated the export-led Chinese growth machine.
由于发达国家罕见地同时出现衰退，一场前所未有的外部需求骤降，摧毁了以出口为导向的中国增长机器。
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Improve stemming quality. By stemming the shot holes with machine-processed stem-soil, the explosive energy utilization ratio rises and 10% explosive are saved.