首先,你得知道有两个版本的双推。
First off, you need to know that there are two versions of DoubleTwist.
把重力添加到你的双推中,添加重力。
提出并解析了等空时双平推流循环流动的数学模型。
Mathematical model of recycle tubular flow with equal space time is pro-posed in this paper.
切纸机的双齿条推纸机构。
切纸机的双齿条推纸机构。
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