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两名业内人士透露,近几个月美国芯片制造商在向中国申请新的钪出口许可证时频频遇到延迟,一些企业已向华盛顿寻求帮助。
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Oct. 3, 2022 Scientists have achieved an 80% conversion yield of a biodegradable plastic material from acetone and CO2, tackling the plastic waste crisis while moving toward carbon neutrality. Scientists have ...