Cho toi hoi ve ap suat 1 ty

Toi muon biet ve cac thang do ap suat (bar, at, mmHg, m cột nước,..), ai biet chi giup cho toi lich su cua may loai thang do nay.
Toi cung biet la 1 vat chat cu the chi chiu duoc 1 ap suat nhat dinh, nhung ko hieu sao nguoi ta co the tang duoc ap suat len rat lon, va cung ko biet hien nay nguoi ta da tao ra ap suat lon nhat la bao nhieu.