Compared with the acid erosion, the copper plate engraving is nontoxic and can help to protect the environment.
英
美
- 铜版干刻技法,首先是它较之酸蚀的无毒,带来了环保的结果。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries