暗室通风孔不同于低质量的塑料通风孔塑料通风口，是由炭黑阳极化处理的铝制造而成，装配RLS模压格子护罩来阻挡雨水或异物。
Darkroom vents are made of fine quality black anodized aluminum, unlike low quality plastic vents, with the RLS die-stamped grilled shield to keep out rain or foreign objects.
暗室通风孔不同于低质量的塑料通风孔塑料通风口，是由炭黑阳极化处理的铝制造而成，装配RLS模压格子护罩来阻挡雨水或异物。
Darkroom vents are made of fine quality black anodized aluminum, unlike low quality plastic vents, with the RLS die-stamped grilled shield to keep out rain or foreign objects.
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