The mechanism of conveying, melting and plasticating of UHMWPE in the extruder were investigated with screw extraction experiment.
研究了UHMWPE在挤出过程中物料输送及熔融塑化机理。
This invention is aimed to solve current screw extraction problem, and empolders structure-changed intramedullary nail to reduce suffering of patients in screw extraction.
本发明的目的为了解决现有的髓内钉断钉取出的问题，开发在结构上改变了的髓内钉，以减少断钉取出时给病人带来的痛苦。
Extraction of black liquor from brown stock may also be effected through screw presses of wash presses.
也可以选用螺旋挤压机或挤压洗浆机从粗浆中抽提黑液。
Conclusions: Extraction force was relevant to screw position.
结论：拔出力大小与螺钉固定位置有关。
Objective To investigate the changes of soft and hard tissues after extraction space closure with micro-screw implant as orthodontic anchorage.
目的研究以微螺钉为支抗，用直丝弓矫治器滑动法关闭拔牙间隙后的软硬组织变化。
The utility model has the advantages of novel design and compact structure, being suitable for various single-screw pump oil extraction systems.
该实用新型设计新颖、结构紧凑，适用于各种单螺杆泵采油系统。
The utility model has the advantages of novel design and compact structure, being suitable for various single-screw pump oil extraction systems.
该实用新型设计新颖、结构紧凑，适用于各种单螺杆泵采油系统。
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