The electric hot water heater element, which is mainly responsible for heating the water to the required temperature. Its performance directly affects the heating speed, stability, and service life of
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Ningbo Longwell Electric Technology Co., Ltd: Established in 1990, turn to experts of HVACR, manufacturer of fans, blowers , motors and components for heating, venlation air conditioner and
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Objective To determine the content of triptolide in Tripterygium wilfordii Hook f.by HPLC.Methods An external standard method was used with Angilent Zorbax SC-C18 …