The surface of cast steel,aluminum,or carbon fiber roll mandrel is coated ceramics layer.After finish machining,the roll surface will be engraved a layer of cell net by laser according to printing fineness,the thickness of ink and so on.Ceramic roll is wi
The 3D shape is designed according to the human face shape to ensure the tightness, to increase the breathing volume of the mask, to greatly improve the permeability, and to make wearing and exhaling more comfortable.
Disc filter contains a spiral structure, the high-speed rotation of the water during filtration to remove dirt from the disc filter, so that there is a separation of sand particles, resulting in a good filtration effect
The group has formulated a strict three-level inspection system of self-inspection, patrol inspection and sampling inspection.Strictly monitor the whole production process and process to ensure qualified raw materials and standard process production Produ