1) S-type directional branch hole
S型定向分枝孔
2) "S"directional hole
"S"型定向孔
3) S drilling hole
S型钻孔
1.
Due to the thick loose level of the downcast shaft Cenozoic group,the large depth of grouting,the requirement of high quality,the time limit for the project in the construction of the Southern Field of Guqiao Coal Mine,the straight hole and the S drilling hole were tied in wedlock each other to carry out the grouting technology,and got fine effects.
针对顾桥煤矿南区进风井井筒新生界松散层厚,注浆深度深、质量要求高、工期紧等特点,采用直孔与S型钻孔相结合的注浆施工技术,取得了良好的效果。
4) Hole-type directional coupler
孔型定向耦合器
5) directional branch-hole drilling
定向分支孔钻进
补充资料：第二孔(继发孔)型缺损
第二孔(继发孔)型缺损
ostium secondary defect
是心房间隔在形成上发生障碍，一般缺损较大，多在卵圆孔附近称第二孔(继发孔)型缺损。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条