（1）316L Welding wire can make welding is more stronger and welding line will not rust, which can improve customer satisfaction, enhance customer stickiness, increase order quantity
（2）Grade A polishing can make the surface more brighter and beautiful,which can increase unit price, increase profit margin and improve customer recognition
（3）Using the special check fixture to check the inlet can make install more conveniently, no need calibrate, which can save installation cost and improve customer experience and satisfaction.
（4）Pipe was cleaned by the ultrasonic wave to make sure there is no impurity inside. Special handling make the pipe inside smooth without the rag to keep the pipe air flow. Stable performance and high experience which get the good reputation from customers and enhance the customer stickiness
（5）We use three-layer packaging, Wrap the anti-oxidation film firstly to prevent product from being oxidized and maintain the luster of the product.Then wrap the pearl cotton and bubble bag to protect the product from damage during transportation,which can save repackaging cost, improve customer satisfaction and recognition.