还有一个主按钮、蓝牙支持，没有屏幕。
目的(1)研究固定桥修复前后基牙支持能力是否发生变化，并探讨其变化规律。
Objective (1) to study whether the maximal occlusal force of abutments before and after restored with fixed partial denture is to change or not, and to probe into the rules of this change.
如果想发送和接收流数据（而且想采用传统的串口应用程序，并给它加上蓝牙支持），那么 RFCOMM更好。
RFCOMM is better when you want to send and receive stream data (and when you'd like to take a traditional serial port application and Bluetooth-enable it).
与非缓冲型套筒冠义齿相比，缓冲型套筒冠义齿对垂直向加载时基牙支持组织及基托下支持组织的应力较小，而且应力在基牙及基托下支持组织的分布更为均匀；
The result indicated that the resilient telescopic denture made the stress on the supporting tissue of the abutments and denture bases under vertical forces lower and its distribution more even.
与非缓冲型套筒冠义齿相比，缓冲型套筒冠义齿对垂直向加载时基牙支持组织及基托下支持组织的应力较小，而且应力在基牙及基托下支持组织的分布更为均匀；
The result indicated that the resilient telescopic denture made the stress on the supporting tissue of the abutments and denture bases under vertical forces lower and its distribution more even.
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