1. Loosen rusty metal screws, conduct laboratory heating research, kitchen baking, and maintain equipment. Automobile repair and welding, aviation equipment repair, water and electricity engineering equipment maintenance. Repair welding of electrical appliances and motor control boxes. Circuit board repair welding, IC board repair welding, indoor and outdoor line road welding. Electronic components on tin, welding, etc. 2. Filling gas: (1)Use gas filling and make sure the switch is closed at OFF, then replenish. (2) the gas canister into the gas hole, the downward pressure to fill. (3) about 10 seconds, can be completed filling gas, wait a few minutes, wait for the gas to stabilize, and then use. (4) If there is a hissing out sound at the end after filling the gas, use the tip of the pen to slightly press the gas inlet to eliminate it. 3. Ignition: (1)Change the tip of the soldering iron. (2)push the switch to the ON place, hear the "hissing" sound. (3) push the electronic switch can be ignited. (4) ignite the fire and burn for 3 minutes, to fire out of reduction, the iron head will continue to heat. (5) adjust the size of the flame. (6) the product temperature up to 1300 degrees (soldering iron temperature 450 degrees), the use of safety, after using the switch off to the OFF position. (7) the use of gas soldering iron, please pay special attention to wait until the flame is completely eliminated, the object inside the iron becomes red, and then operate to extend the life of the iron head. Caution: 1, replacement connector, please wait for cooling before replacement or change in advance. 2, the use of the soldering iron head, high temperature and hot, please do not touch with your hands. 3,Adjustment knob can control the amount of gas and temperature, usually placed in the middle position. 4, after use to cool down, and t