Newspaper news one kind of steel frame visible glass fiber reinforcedplastic air throttle developed on the other day in Shandong near theore group old city coal mine successfully. It solved the ordinary airthrottle because to attack well the difficult problem which thegeostatic pressure influence distorted, lastingly passed for therealization guards against has safely created the advantage.
This air throttle is changes into the original lumber doorframe by thesteel frame which is composed, outside wraps an old leatherbelt again, installed 2 millimeter thick glass fiber reinforcedplastic material in the lignin air throttle surface, among the airthrottle has used has transparently modelled the steel material,between the air throttle is mutually transparent but does notventilate, has realized visibly. This product also has "the resistantto compression ability to be strong, the fire protection, thecorrosion preventing" and so on the merit. |
