(用手比一比,其道理和打陀螺会径动(Precission)的原理相同.)于是使得车子恢复直立而回到平衡处.
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high precission shoran 高精度肖兰
hydrographic precission scanning echo sounder 水文精密扫描回声测深仪
Precission Metering Apparatus &Calibration Instrument 工业计量仪器及工控产品检测校准仪表
The practical flow measurement calculation formula is proposed. Several factors effecting on the precission of measurement are analyzed. A proposal for developing this product is put forward finally.
详细介绍了均速管的几种结构形式，给出了实用流量测量的计算公式。
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