一E604010機械安裝業.︵營造業除外、至客戶處作業︶二E599010配管工程業.︵營造業除外、至客戶處作業︶三E603110冷作工程業.︵營造業除外、至客戶處作業︶四E202010起重工程業.︵營造業除外、至客戶處作業︶五F111070金屬建材批發業.六E603100電焊工程業.︵營造業除外、至客戶處作業︶七E603120噴砂工程業.︵營造業除外、至客戶處作業︶