它总是有一些光面和微磁性的不锈钢紧固盖螺钉。
It always has a number of smooth and micro-magnetic stainless steel fastening screw cap.
铬镍不锈钢在退火状况下通常是无磁性的，在冷加工之后，有的会有磁性的。
Chromium nickel stainless steel is usually non - magnetic in the annealed state, some of which are magnetic after cold working.
阿正弦波交流电压产生的同步信号中的齿轮碳钢，不锈钢磁性，或铁(黑色金属)提出的存在。
A sine wave alternating voltage signal is generated synchronously in the presence of gear teeth made of carbon steel, magnetic stainless steel, or iron (ferrous metal).
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