半球谐振陀螺仪(hemispherical resonator gyro,简称hrg)是哥式振动
264 720p hd wireless wifi ir hemispherical ip camera
ice and snow, but in fact, shima hito's igloo is hemispherical
资讯 汽配常识 hemi hemi是源于"hemispherical"一词的缩写,是
38mm tungsten steel material hemispherical pneumatic grindin