No matter be aluminium alloy window, still be plastic window, it is flat open a window to replace push-pull window gradually, this is the fact that does not open.Its fundamental reason, it is the performance that existing push-pull window compares level to open a window to differ very much.

But the author thinks, compare level open a window, aluminium alloy push-pull window (include plastic push-pull window) advantage has 3 o 'clock: it is safety: push-pull window compares level open a window safety.The open fan of the sliding window has upper and lower glide path restrictions, unless people take the initiative to remove, it is impossible to automatically fall off.The flat window is only fixed by two hinges, and the strength of the joint is limited.

The second is the performance of the plane deformation of the open fan: the open fan of the sliding window is mounted firmly in the balance between the upper and lower chutes, and will not deform in the plane due to the weight.The open fan is fixed at one end and free at the other end.It is easy to deform in the plane and fall out of Angle, that is, the free end sinks under the action of gravity, which affects the use or aesthetics.The advantage that push-pull window more outstanding is to open when using do not occupy a space.Hence the particular preference among users.