Aluminumbrazing铝钎焊QJ201Aluminumbrazingflux铝钎焊熔剂Brazingfluxofaluminumandaluminumalloyswithin450-620℃.在450-620℃范围钎焊铝及铝合金的助熔剂QJ207Aluminumbrazingflux铝钎焊熔剂Brazingfluxofaluminumandaluminumalloyswithin560-620℃.在560-620℃范围钎焊铝及铝合金的助熔剂)