它有十四条腿，最前面的两条活动自如，可以用来将食物抓进它四瓣形的口中。
Its legs are arranged in seven pairs, and its front two are able to manipulate and bring food to its four sets of jaws.
阀杆应该是六角形或方形，以确保阀瓣能够灵活旋转，并且完全密封，不会暴露在处理的液体里。
The shaft shall be hexagonal or square to ensure positive rotation of the disc and be totally sealed from exposure to the process liquid.
在重建小耳症时以耳后筋膜皮瓣包覆一自体锲形软骨达成稳定的耳廓立起。
Firm elevation of the auricle in reconstruction of microtia with a retroauricular fascial flap wrap-ping an autogenous cartilage wedge.
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