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| primary (basic) standard | 基础标准 | |
| primary air | 一次风 | |
| primary air fan | 一次风机 | |
| primary air fan-coil system | 风机盘管加新风系统 | |
| primary air heater | 第一级空气预热器 | |
| primary air system | 新风系统 | |
| primary amine | 伯胺 | |
| primary argon system | 一回路氩气系统 | |
| primary auxiliary building | 主回路辅助厂房 | |
| primary battery | 原电池 | |
| primary cell | 原电池 | |
| primary circuit | 一次电路 | |
| primary coil | 一次线圈 | |
| primary complex | 原发性复征,原发综合征 | |
| primary coolant | 一次冷却剂 | |
| primary current | 一次电流 | |
| primary distribution main | 一次配电干线 | |
| primary electron | 一次电子 | |
| primary emission | 一次发射 | |
| primary feedback | 执馈 | |
| primary frequency microseism | 主频微震 | |
| primary frequency regulation | 一次频率调节 | |
| primary frequency standard | 一级频率标准,基本频率标准 | |
| primary impedance | 一次绕组阻抗 | |
| primary inductance | 初级线圈电感 | |
| primary ionization | 初级电离 | |
| primary light source | 一次光源 | |
| primary line switch | 第一级寻线机 | |
| primary luminous standard | 发光源标准 | |
| primary magnetic standard | 主磁点 | |
| primary motor | 主电动机 | |
| primary photometric standard | 光度基准 | |
| primary quantum number | 主量子数 | |
| primary radar | 一次雷达 | |
| primary radiation | 原辐射 | |
| primary radiator | 原辐射器 | |
| primary relay | 一次继电器,初级继电器 | |
| primary relief system | 一回路卸压系统 | |
| primary relief tank | 一回路卸压凝汽箱 | |
| primary return air | 一次回风 | |
| primary sampling system | 一回路取样系统 | |
| primary seal assembly | 初级密封组件 | |
| primary seal unit | 初级密封单元 | |
| primary side | 一次侧 | |
| primary source | 一次光源 | |
| primary spectroscopic standard | 原光谱标准 | |
| primary standard | 原始标准,标准原器,原标准器,主基准,一级标样,原始标准,原标准,基准 | |
| primary standard fuel | 正标准燃料 | |
| primary standard pyrheliometer | 基准直接日射表 | |
| primary standard sample | 一级标样 | |
| primary standard sound source | 原标准声源 | |
| primary standard substance | 原始基准物质 | |
| primary system | 一次系统 | |
| primary test | 一次试验 | |
| primary voltage | 一次电压 | |
| primary wave | 初波 | |
| primary winding | 一次绕组 | |
| prime | 涂底层 | |
| prime cost | 原价 | |
| prime motor | 原动机 | |
| prime mover | 原动机 | |
| principal axes | 各向异性材料导热系数分布的主轴 | |
| principal axes of inertia | 主惯性轴 | |
| principal axes of strain | 形变主轴 | |
| principal axes of stress | 应力主轴 | |
| principal axis | 主轴线 | |
| principal beam | 主梁 | |
| principal characteristic | 重性 | |
| principal clock | 母钟 | |
| principal current | 主电流 | |
| principal feedback | 主反馈 | |
| principal focus | 主焦点 | |
| principal ideal integral domain | 主理想整环 | |
| principal inertia axis | 主惯性轴 | |
| principal layout | 总布置图 | |
| principal lobe | 主波瓣 | |
| principal mode | 主型,基型 | |
| principal motor | 主型,基型 | |
| principal normal | 主法线 | |
| principal nuclear facility | 主要核设施 | |
| principal oscillation | 主振荡,主振动 | |
| principal part | 本体部分 | |
| principal plane | 主平面 | |
| principal plane of bending | 弯曲主平面 | |
| principal power | 主电源 | |
| principal quantum number | 主量子数 | |
| principal rafter | 上弦,人字木 | |
| principal reactance | 主电抗 | |
| principal reinforcement | 主钢筋 | |
| principal strain | 主形变,主应变 | |
| principal stress | 主应力 | |
| principal stress trajectory | 主应力线 | |
| principal tapping | 主分接头,主抽头 | |
| principal terminal | 主端子 | |
| principal theorem | 基本原理 | |
| principal voltage | 主电压 | |
| principal wave | 主波,基波 | |
| principal winding | 主绕组,主线圈 | |
| principle | 原理,原则 | |
| principle control diagram | 控制原理图号 |
