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【单选题】
将降尘室用隔板分层后,若能 100% 除去的最小颗粒直径要求不变,则 颗粒的 沉降时间 。
A.
变大
B.
变小；
C.
不变 ；
D.
不确定。
拍照语音搜题，微信中搜索"皮皮学"使用
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