Seathn.西思
seatn.座位;底座;席位;臀部;所在地vt.使坐下;可容纳vi.坐
seat/occupant system人椅系统
seat reservation voucher定座凭证
seated directional valve座式换向阀
seat distribution method席位公配方法
seat-type survival kit座垫式救生包
seats arranged in a wedge排列成楔形座位
seat occupany coefficient座席占用系数
seat-ejection initiator座椅弹射起爆器
seat belt pre-tensioner安全带预紧装置
seating directional valve座式换向阀