Screw and barrel materials used 38crmoala, nitrogen treatment, with special screw structure.
螺杆、机筒材料采用38crmoala，表面氮化处理，采用专用螺杆结构。
The utility model with high sensitivity to external magnetic field, high coupling performance, and self-outfit of a shielding barrel can be operated in the liquid nitrogen temperature region.
这种干涉器可在液氮温区工作，对外磁场灵敏度高，耦合性好，又可自身配备屏蔽筒。
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