There are logs and clay bricks for damming ; raceways for flowing water originate in far-off springs.
在遗址上发现了用于建造大坝的木材和粘土砖, 还有从远处的泉水引来流水的水渠.
Influence of inner ring double raceways centre distance of self-aligning roller bearing on radial clearance
调心滚子轴承内圈两滚道中心距对径向游隙的影响自动调心球面滚子轴承
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