The design parameters of chamber and stiffener of hollow blade model were analyzed.
对空心叶片模型型腔和加强筋结构设计参数进行了分析；
An experimental technique and method for flutter research of helicopter blade model are proposed.
提出了直升机模型桨叶颤振试验技术及试验方法。
The blade of the paper knife of the utility model is convenient to change.
本实用新型的割纸刀可方便地更换刀片。
The blade of the paper knife of the utility model is convenient to change.
本实用新型的割纸刀可方便地更换刀片。
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