Technical performance: "Not lose integrity: refractory limit > 4.00 h
"The opening and closing speed should be: 2 m/min-7.5 m/min
"Leakage cigarette not should be greater than 0.2 m3 / (m2 * min)
"Wind pressure resistance performance: 50 type shade board B = 3 m, in more than 30 mm across deflection