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桩
桩 zhuāng
7 nouns take this classifier
事 shì HSK 1 · matter 事情 shì qing HSK 2 · affair 事故 shì gù HSK 3 · accident 大事 dà shì HSK 5 · major event 婚姻 hūn yīn HSK 7-9 · marriage 案件 àn jiàn HSK 7-9 · case 心事 xīn shì HSK 7-9 · a load on one's mind