SOUNDING PIPES, HATCHES, ETC. LEADING TO SPACE AFIRE. SPEND A LITTLE TIME THROUGHLY SEALING ALL OPENINGS OF THE SPACE AFIRE TO PREVENT EXCESSIVE LEAKAGE OF CARBON DIOXIDE.

• 4完全封闭上列通往发生火灾区之所有的通口，由于火灾区完全封闭，可以防止二氧化碳的洩漏。