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自动底盘 zìdòng dǐpán
gen.	tool bar carrier
agric.	power frame; self-propelled chassis; tool carrier
agric., tech.	tool bar; tool-bar
tech.	implement porter; self-propelled carrier; self-propelled tool carrier; self-propelled tool chassis; tool-carrier chassis
transp.	implement carrier; self-propelled tool chassis
自动〔自走式〕底盘
gen.	open-frame tractor
construct.	implement porter
自动推进式底盘
tech.	self-propelled chassis

自动底盘: 3 phrases in 2 subjects

Agriculture	2
Technology	1