適用范圍Application 1區、2區危場所。 IIA、IIB、IIC類爆竹性氣體環境. Can be used in Zone 1 and Zone 2one 2 dangerous places. Can be used in IIA,IIB 、IICgroup explosive atmosphere. 型號含義Model implication 產品特點 Features 鑄鋁合金外殼,表面噴塑. 圓筒隔爆面,防爆性能好,安全可靠. 鈴碗表面鍍鈹青銅,打擊時不會引起火華. 符合GB3836-2000,IEC60079 標準要求. The shell is of diecasted Al-alloy with plastic-sprayed surface. Cylinder enclosure can be well explosion-proof,safe and secure. The surface of bell is brass plated,which won’t produce sparkle when being hitten. Suitable for GB3836-2000,IEC60079 standard request.