machine-made hollow charcoal 机制空心炭
I plant the production of machine-made charcoal is made of pure wood processing.
我厂生产的机制木炭是纯木屑加工而成的。
youdao
We have managed full arts and crafts of Machine-made charcoal through a lot of learning.
经过大量学习，我们已经掌握了机制碳完整的工艺。
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