standard head dummy 标准头型

standard head model 标准头型

standard sprinkler head 标准洒水喷头

standard atmospheric head 标准气压水头

standard with cranked head 弓形床架

standard over head rate 标准制造费用分配率

flanged and standard dished head 带折边的标准碟形封头

standard ellipsoidal head 标准椭圆封头

standard elliptic head 标准椭圆形封头