Definition

1. Adjective:
   • Pneumatic: Relating to or operated by air or gas under pressure. This describes devices, tools, or systems that use compressed air to function.
   • Aerodynamic: (Note: This is a distinct, advanced meaning. The primary meaning in the given context is "pneumatic"). Relating to the properties of a moving object interacting with air, concerning forces like drag and lift.

Usage Examples

• Adjective (Pneumatic):

  • Công cụ này chạy bằng hệ thống khí động. (This tool runs on a pneumatic system.)
  • Anh ấy sử dụng búa khí động để đóng đinh. (He uses a pneumatic hammer to drive nails.)

• Adjective (Aerodynamic - Advanced):

  • Thiết kế khí động của xe giúp tiết kiệm nhiên liệu. (The car's aerodynamic design helps save fuel.)

Advanced Usage

• In technical/engineering contexts: The term is almost exclusively used to mean "pneumatic," especially when referring to industrial tools, machinery, or control systems.
  • Đường ống khí động (Pneumatic pipeline)
  • Xi-lanh khí động (Pneumatic cylinder)

Variants and Related Words

• Khí động học (Aerodynamics): The study of the motion of air and other gases and the forces acting on objects moving through them.
  • Khí động học là một nhánh của cơ học chất lưu. (Aerodynamics is a branch of fluid mechanics.)
• Khí nén (Compressed air): The pressurized air used in pneumatic systems.
  • Máy nén khí tạo ra khí nén. (The air compressor generates compressed air.)

Synonyms

• Chạy bằng khí nén: Operated by compressed air. (A descriptive phrase, not a single word).
• Thuộc về khí nén: Pertaining to compressed air. (A descriptive phrase).

Notes on Different Meanings

• The core and most common meaning of 'khí động' in Vietnamese, especially in technical and industrial contexts, is pneumatic.
• The meaning aerodynamic is a specialized, secondary meaning derived from the compound term 'khí động học' (aerodynamics). When used alone to mean "aerodynamic," it is often within specific technical discussions about vehicle or object design.

1. pneumatic
   • Búa khí động
     Pneumatic hammer