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pneumatic seed-metering device
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pneumatic seed-metering device
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农学
气吹式排种器
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pneumatic seed-metering device
气吹式排种器
以窝眼轮式排种器为基础,改进清种装置,以气流为清种手段的排种器(见图)。
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Newly Printed Ancient and Present Essays with Scholars’ Commentaries
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