A servo drive pulls the two flanks alternately in longitudinal direction, thus moving the wing up and down.
一个伺服驱动两片侧翼交替地纵向移动，驱使羽翼上下运动。
Gunners boss Wenger said: 'he has pace, commitment, is very mobile and versatile - he can play on two flanks or in the centre.
枪手主教练温格说：“他有速度、责任心强、非常灵活，是全能型选手，可以在两翼或中间活动！”
The abundant natural gas accumulation are concentrated in the subtle traps (relatively lower relief traps in East Sichuan)developed at the two flanks of the main structural belt.
天然气主要富集于主体构造两侧的低潜圈闭（经地震发现的闭合高度相对较小的潜伏圈闭），已发现双家坝和胡家坝两个气藏。
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