wide projective bundle宽: wide; broad投射: throw; cast project; cast光束: light beam a surname投射光: projection light投射光束式感烟火灾探测器: projected linear foam smoke detector下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:宽投射光束，即可在微信中查询翻译
