The invention provides a wax regenerative heaters, comprising: Insulation casing; barrel body, which is accommodated in the insulating housing, the contents of the barrel is placed water; heat exchange coil, coiled manner which is accommodated in The barrel body, and has a water inlet and outlet; an.....
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The present invention relates to an insect repellant fabric and a method for making the same. The method of making the, comprises the steps of dissolving a polysaccharide compound in an aqueous solution; heating said solution; adding a prytheroid mixture to said solution; initiating graft polymeriza.....
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The invention relates to a resonant switched capacitor direct current voltage converter which comprises a first voltage node, a second voltage node, a first switch, a second switch, a first diode, a sThe invention relates to a resonant switched capacitor direct current voltage converter which compri.....
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