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How to make the felt harder and whiter? This is a trade secret,It's hard to find!Recording, video series-Computer, camera-Fax, phone-Microwave, dryer-Air conditioning-Machinery of various industries-Various motor series-Very thin wire processing-Dust mask-Refrigerated frozen machine-Semiconductor, glass, metal-Engine-Oil filter device-Other shipments-Piano, percussion instruments-Electronic instruments-Sports equipment-Medical equipment-India--Oil storage,Black/white eraser--Soft, not scratched black/whiteboardWear-resistant,Wipe clean Nangong Tianyun felt products factory mainly produces felt and felt products of various specifications.Product varieties: Felt series: fine white industrial wool felt, medium-thick wool felt, color wool felt, soft felt, oil-absorbing felt, chemical fiber needle felt, polished felt, stainless steel polishing felt, sporting goods felt, thermal insulation felt, filter felt, saddle felt, process felt, felt for board rubbing, felt for printing, felt for pai
Do you have to have coral and bottom sand for sea fish? Seawater is two different water quality from fresh water,It not only shows different chemical properties of water,It is also manifested in the difference between movement and static.The sea tide and tide,Never ending.It is difficult for seawater ornamental fish to live in light water,It is also difficult for freshwater ornamental fish to live in the sea,Therefore, the premise of raising ornamental fish in seawater,It is to fully understand the properties of seawater.(1) water temperature: The water temperature requirements of seawater ornamental fish are higher than that of freshwater tropical fish,They are sensitive to changes in water temperature,The range of temperature changes that can be adapted is very narrow.The water temperature of natural seawater is more than 25-28 ℃,The daily temperature difference of water temperature is very small.The water temperature in the aquarium should be controlled at 27-28 ℃,The daily t
