The device comprises an upper sealing block, a lower sealing block and a sealing device;

是 由上密封块、下密封块和密封装置所组成。

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The sealing block of the bag-making machine is a typical heating object which has characters of nonlinearity and lagging.

制袋机的烫刀是一个典型的具有非线性、大滞后和不对称性特点的加热设备。

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Under the seal block plays a sealing effect between the hooked rabbet and the glide path, can be useful to avoid splashing in the attack scene shake load under the effect of using three epdm.

下密封块是起着勾企与下滑道之间的密封效果，可有用避免在动摇荷载的效果下溅水景象的发作，应运用三元乙丙橡胶。

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Phan, along with my friend and commenter Marq Hwang, suggested ditching expensive and bulky noise-cancelling headphones in favor of smaller earphones that block noise by sealing off the ear canal.

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Thuan Phan, who spends about half the year as a sales engineer, points out that the advantage in space and cost goes to small earphones that block noise by sealing off the ear canal.

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