positive control area的意思|示意
积极管制区域；绝对管制区
positive control area的网络常见释义
绝对管制区 A类：即绝对管制区（positive control area）,横跨美国全境，从18000英尺MSL至60000英尺，之有IFR飞行，ATC机构负责所有飞行间的间隔。
积极管制区域 positive control area (PCA) 积极管制区域 positive displacement blower 排量式鼓风机 positive driver type supercharger 齿轮转动增压器 ..
主动管制空域 – 主动管制空域（Positive Control Area） – 终端管制空域（Terminal Control Area）
positive control area相关短语
1、 PCA Positive Control Area 绝对管制区
2、 area positive control 区域绝对管制
3、 APC Area Positive Control 区域绝对管制
positive control area相关例句
The area of substance P positive fiber and its terminus in posterior of spinal was smaller in experiment group remarkably than in control group.
脊髓灰质后角P物质免疫反应阳性纤维面积及灰度均明显小于对照组。
The estrogen positive reaction area coefficients in ovaries and oviducts of the hens in experiment groups of various dosages were significantly higher than those in the control group.
试验各剂量组鸡卵巢和输卵管中雌激素阳性反应面积系数均显著高于对照组。
The practlce has shown that the overlying separate seam grouting is a positive, effective and economic new-countermeasures on the control and treatment of mining-area subsidence.
实例证明，覆盖离层注浆是治理矿区塌陷环境的积极的、有效的、经济的新对策。