Use style=\"margin:1.12em arial 宋体 Brand New Original Attention:Please note whether you need a gold or gray spray nozzle when purchasing. If you are unsure whether you need a gold or gray spray nozzle, please contact us before purchasing and we will provide you with the correct guidance.If you do not make a note, we will ship it randomly.1. It needs to be installed by professional personnel.2. Please pay careful attention to the accessory model information when purchasing. Once you receive the product, please check if it meets the model you need. If you have any questions, please contact us as soon as possible. Please note that once the accessories are installed on the machine, we do not accept any refunds or refunds.Because the nozzle is a precise and delicate object, please pay attention to the following points:1.When unpacking and inspecting the nozzle, please do not touch the surface of the nozzle with your fingers or palms, as the skin of the human body is greasy, which can easily cause the nozzle surface to be stained with oil and prevent normal ink discharge!2. If there are water droplets on the surface of the nozzle, it is the moisturizing liquid of the nozzle, which was thrown out from the nozzle during shipment. The liquid is not water but protective liquid, so there is no need to worry about the nozzle getting water or something. If protective liquid is accidentally spilled on the circuit board, you can use a paper towel to dry it.3. Before installing the printing head, please check whether the printing head data line of your printing device is normal (such as whether the gold fingers of the cable are corroded, or the gold fingers are separated from the peeled gold fingers, and there is a touch short circuit between them). If the printing head data line is abnormal, it must be replaced with a new pair; Check if the cleaning unit is covered with ink residue. If there is any coverage, use a cotton swab dipped in alcohol to slowly clean it!4. Check whether the lubrication of the moving parts inside the machine, such as the axle rail, is normal. If it is very dirty, you can wipe it with a paper towel first, and then wipe the clean lubricating oil. When wiping the lubricating oil, please be careful not to get the grease on the grating strip. If you do not do it carefully, gently wipe it with a paper towel!When installing the nozzle, please pay attention to cutting off the power supply of the machine. It is easy to burn the nozzle and motherboard by plugging and unplugging the nozzle with power!6. For those who have used the consumables for too long and caused them to expire, which affects the printing effect, they do not hesitate to replace them with brand new consumables. This not only quickly solves the problem, but also is equivalent to buying a brand new set of ink, which is very cost-effective!