患者大多有典型的四肢近端短小，大头，前额突出，以及三叉戟状手。
Patients usually had typical rhizomelic short stature, large head, frontal bossing and trident fingers.
并对辊端叉头的结构和维护提出改进意见。
Meanwhile, the improvement advices for the structure and maintenance of the roller end clevis are provided.
拨叉组合带动翻转板的端轴，使翻转板实现一前一后的翻转。
The dialing fork assembly drives the end shaft of the turnover plate for back and forth turnover.
梳状换能器可看成若干叉指单元电端并联，声端首尾串联而成的网络，采用单向结构可降低采用这种结构的声表面波延迟线的损耗。
The comb transducer can be considered as the network of the parallel connection of some units of IDT electrical ports and the series connection of their acoustic ports.
梳状换能器可看成若干叉指单元电端并联，声端首尾串联而成的网络，采用单向结构可降低采用这种结构的声表面波延迟线的损耗。
The comb transducer can be considered as the network of the parallel connection of some units of IDT electrical ports and the series connection of their acoustic ports.
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