The Hurricane Center warns people not to take the threat of tropical storms lightly...飓风中心警告人们,不要对热带风暴的危险掉以轻心。Warns or ejects troublemakers, and cautions careless persons.警告制造麻烦的人, 并小心那些不仔细的人.With almost evangelical ferv...
分离颗粒常用的装置是惯性冲击器, 旋风分离器, 静电除尘器和过滤器.For particulates, the favored devices are inertial impactors, cyclones, electrostatic precipitators, and filters.风动冲击器是气动冲击回转钻进的主要设备之一.Pneumatic DTH ( Down - The - Hole ) hammer is one o...