total friction head

英语单词head是什么意思，英文单词查询head，... ... torsion head 扭头 total friction head 总摩擦损失 transverse head 横向磁 …

直角三角形_馆档网 ... "总熵"," total entropy" "总摩擦落差"," total friction head" "总硬度(水质)"," total hardness" ...