打喷嚏或咳嗽时要掩着口鼻，并妥善清理口鼻排出的分泌物；
Cover the nose and mouth while sneezing or coughing and dispose of nasal and mouth discharge properly;
喷管末端设有清理口，当料浆堵塞喷嘴时，可通过清理口用铁条将堵塞的喷管疏通。
The end of spray tube is arranged with a clean opening, therefore, when the nozzle is blocked by slurry, user can use iron bar to clean the blocked nozzle tube from the clean opening.
为了建一所学校，他曾一口气清理了460家违规店铺。
He had cleared away 460 illegal shops in order to build a school.
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