短而宽，折皱的脸颊和嘴唇正好包住牙齿。

Muzzle - short and broad with well-cushioned cheeks and rounded upper lips that cover the teeth.

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这些所有的金属吸油过滤器都配有优化折皱的大小和过滤面积为延长寿命和压力降。

These all metal suction strainers are furnished with optimized pleat size and screen area for extended life and low pressure drop.

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通过对亚麻纤维的化学组成和微观结构的分析，研究了亚麻纤维弹性不好、易折皱的原因，提出了几种提高亚麻纤维弹性的方法。

We analyze the reasons of low in elasticity and easy to wrinkle for flax fibers, with respect to their chemical composition and microstructure. Ways to improve flax fibers' elasticity are discussed.

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