track main control valve 履带主控制阀
right track main control valve 右履带主控制阀
left track main control valve 左履带主控制阀
track main link 履带主链节
main track 干线 ; 正线 ; [计] 主磁道
track main roadway 轨道大巷
main line track 干线
principal main track 主正线
main line test track 行车线测试路轨 ; 主线测试路轨
track main
跟踪主要
以上为机器翻译结果，长、整句建议使用 人工翻译 。
David Lehr, the Churchill Downs track superintendent, has downgraded the main track to "sloppy" due to consistent rain falling Saturday morning and early afternoon.
NPR: DERBY LIVE: Orb Wins After Surging Among Bettors
The old rail track became a main approach to the centre along the Rideau Canal.
ECONOMIST: Canada
On the main track employers offer a streamlined menu of mutual fund choices to keep average workers from feeling overwhelmed.
FORBES: Jumping Out The 401(k) Brokerage Window
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