| 摘要 |
IMPROVEMENTS IN OR RELATING TO SAFETY APPARATUS Inventor: Adrianus Jacobus Hengelmolen A safety door for a furnace or like apparatus is operable to open under the force of a hydraulic cylinder when the pressure under the furnace exceeds a predetermined upper limit corresponding to an abnormally high pressure caused by an explosion within the furnace or like apparatus. The safety door thereby prevents the furnace from being permanently damaged by an explosion.
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