No direct relationship has been demonstrated between the direction of relative plate motion and linear …
非洲板块与欧洲板块的相对运动方向和由阿尔卑斯期变质岩。
The butterfly valve butterfly plate installed in pipeline diameter direction.
蝶阀，可以安装在任一个方向上。
The butterfly valve butterfly plate installed in pipeline diameter direction.
蝶阀，可以安装在任一个方向上。
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