前者包括石墨、金属硫化物等；

The former includes graphite, metallic disulfide, etc;

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本发明包括石墨喷头和石墨-陶瓷复合喷管。

The invention comprises a graphite nozzle and a graphite-ceramic composite nozzle.

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前者包括石墨、金属硫化物等；后者包括层状硅酸盐、金属双氢氧化物等。

The former includes graphite metallic disulfide etc; and the latter consists of layered silicate metallic double hydroxide etc.

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