The circuit design principle, calculating formula and assembly technique of self - made WY - 1a multimeter experiment instrument are elaborated.
阐述了自制WY - 1a型万用表实验仪的电路设计原理、计算公式及组装技术。
DESIGN: a completely randomized experiment with self-control and mutual control.
设计：完全随机设计，自身及组间对照。
We have a large plant base with self-contained establishments, abundant technical Power and rich experiment in design and manufacture.
公司生产基地设施完备、技术力量雄厚。具有丰富的设计制造经验。
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