The protect frame of marine optical instrument needs enough strength and small self-shield effect, which is somewhat conflicting.
海洋光学测量仪器的保护框架既要有足够强度，又要自屏蔽效应小，这是一对矛盾的要求。
The thermal neutron fluence subsidence factor measured is basically in conformity with the self-shield factor deduced from the report of the producer of the tube.
测量得到的热中子注量率沉降因子与根据生产厂家报告推出的自屏因子基本符合。
Not in a no gain since the shield, not to have a selfish self tired.
不以一毫私利自蔽，不以一毫私欲自累。
Composite shield is characterized by self - driving and cast in site reinforced concrete lining instead of segmental lining.
组合式盾构的特点是能自行推进，可不用装配式衬砌管片，而采用现浇钢筋混凝土衬砌。
Based on self-made stepping arc stud welding gun, the welding process adopting ferrules as arc shield was studied.
利用自行研制的步进式电弧螺柱焊枪，采用套圈作为焊接过程的保护方式，研究了套圈保护步进式电弧螺柱焊过程。
Based on self-made stepping arc stud welding gun, the welding process adopting ferrules as arc shield was studied.
利用自行研制的步进式电弧螺柱焊枪，采用套圈作为焊接过程的保护方式，研究了套圈保护步进式电弧螺柱焊过程。
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