noun
pyrotechnic device; explosive device
Technical term used in military, industrial, and safety contexts for devices that use pyrotechnic or explosive materials, such as detonators, squibs, and initiators.
火工品の取り扱いには特別な資格が必要です。
Handling pyrotechnic devices requires special certification.
この工場では自動車用エアバッグの火工品を製造
This factory manufactures pyrotechnic devices for automobile airbags.
爆発物 is a broader term for any explosive substance or device, whereas 火工品 is more specific to engineered pyrotechnic components.
Compound of 火工 (pyrotechnics, literally 'fire work') and 品 (article, product). The exact historical derivation is uncertain, but the term is a modern technical coinage.