Jiu Duo Yuan has a great objective to achieve to be a famous brand in wallet phone cover market. Get quote! Engaged in the Production of custom cell phone case since 2015 Compared with products in the same category, Dongguan Jiuduo Plastic Products Co., Limited's iphone wallet case has the following outstanding features. Jiuduo has been engaged in the production of custom cell phone case for many years and has accumulated rich industry experience. We have the ability to provide comprehensive and quality solutions according to actual situations and needs of different customers.
What are the functions of the vacuum cleaner? is it easy to use? It's still easy to use,Power part: Vacuum cleaner motor and governor.Governor break-up control and machine control.Motor: There are copper wire motors and aluminum wire motors.Copper wire motors have the advantages of high temperature resistance, long service life and long single operation time,But the price is higher than the aluminum wire;Aluminum wire motor has the characteristic of low price,But poor temperature resistance, low melting point, long life than copper wire.Governor: the manual control type is generally adjusted by the air door (as shown in the figure );The machine control type is a power-type handheld key or infrared adjustment.Filter System: dust bag, front filter, rear filter.Different and divided according to the filter material: paper, cloth, SMS, Haipa (HEPA efficient filter material ).Vacuum cleaner filtration system and components (6 sheets ).Functional part: the receiving and discharging mechanism, the indication
Industrial removal of soluble impurities, repeated immersion of coarse salt filtration with saturated sodium chloride solution is why? Crude salt contains insoluble impurities such as sediment,And soluble impurities such as Ca 2,Mg 2,2-Wait.Insoluble impurities can be removed by filtration,Ca 2 in soluble impurities,Mg 2,2-The solution of BaCl2, sodium hydroxide and sodium carbonate can be added,Precipitation filtering is generated and removed.Instruments for crude salt purification: pallet balance (including weights ),Cylinder,Beaker,Glass rods,Spoon,Funnel,Filter paper,Iron frame (with iron ring ),Pan,Alcohol lamp,Pliers,(1) Take 2 grams of coarse salt (accurate to 0) by pallet Tianping.1G ).Use the measuring cylinder to take 10 ml water and pour it into the beaker and stir it with a glass stick,Until the crude salt is no longer dissolved.(6) add a proper amount of HCl to the filter (remove excessive sodium hydroxide and sodium carbonate, you can choose to control the amount added with pH test
