Other main - belt asteroids are already named for science fiction luminaries Robert Heinlein and Isaac Asimov.

其他在主要小行星带的小行星也已经以科幻小说杰出作家罗伯特.汉莱与以撒.艾西莫夫之名命名.

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PP packaging materials are the main belt , steel belt, Chan Raomo, shrink film.

主要包装材料有PP带, 塑钢带,缠绕膜, 收缩膜等.

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