First, sulfur machine \ plus government quality inspection departments have flow machine "inspection certificate." 
     Second, vulcanizer \ plus flow machine must have a registered trademark. 
     Third, vulcanizer \ plus flow machine must have: name and address, contact phone number. 
     Fourth, vulcanizer \ plus flow machine must produce performance standards, no. 
     Fifth, there is the intellectual property of the original manufacturers looking to buy, maintenance service, sticks, more secure. 
     Six obtain reasonable grounds trademark certificate to the seller if necessary, a copy of qualified inspection reports.