Material introduction: Uses and features The company has produced two series and more than 10 varieties of bolt heating units in order to improve work efficiency. WQJ turbine bolt low-voltage heating unit is preferred by users for features such as high security and reliability, convenient operation, and long service life. ZJK-I DC adjustable bolt heating control cabinet is used with DC bolt heater. It has advantages such as high output power, high security and reliability, and etc.