To overcome the shortcomings of the shear pin type joint and left-hand thread type joint, a sliding sleeve subsurface safety joint is developed.
为了克服剪钉式和反扣式两种安全接头的不足，研制出一种滑套式井下安全接头。
2
On the other hand, the tenacity, conductivity and shear strength of conductive adhesive were enhanced by the incorporation of SiO2/Ag composites into conductive adhesive.
同时，在引入载银二氧化硅后，导电胶的韧性、导电性和剪切强度得到有效改善。
3
In order to move the hand-held electric shears conveniently, proper positions at the bottoms of the shear bodies are provided with a proper amount of rollers.