The result shows that the fracture mode is low stress brittle fracture. The fracture is mainly caused by needle type martensite in the heat affected zone of the weld joint.
结果表明，在连接杆焊缝附近的热影响区中存在大量针状马氏体组织，在低应力的作用下，导致材料发生脆性断裂。
A simple and feasible low-cost experimental system has been designed and made by using the lateral moving structure of the old-fashioned needle-type printer as the basic mechanic structure.
利用旧式针式打印机的横向走行结构，作为倒立摆的基本机械结构，设计并制作一种简单可行的低成本倒立摆实验系统。
The utility model discloses an automatic alarm for needle-type transfusion, which belongs to the manufacturing technical field of transfusion alarming devices in the hospital.
本实用新型公开一种针式输液自动报警器，属于医院输液报警装置类制造技术领域。
The utility model discloses an automatic alarm for needle-type transfusion, which belongs to the manufacturing technical field of transfusion alarming devices in the hospital.
本实用新型公开一种针式输液自动报警器，属于医院输液报警装置类制造技术领域。
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