λπ
πβοΈπζ²»ζ°΄
β³π°
π§±π§π§π§
π₯ππβοΈ
πππΆη¦Ή
πβ³π°
π§±π§π«
π§±π§¦π
β³ποΈπ§±π§
ππ§±π₯½
π§±ππ§
ππ§±π§
ποΈπ°
ποΈπ§π§
πβπ§±
ποΈπ§±π
π§ππ§
π§±π§βοΈπ€
π§β‘οΈπ€
#holding back #restrain #control volume #dam #flood control #barrier #stopping force