central granule，central plug
【建筑】封闭钻孔藏钻井的带可充气套筒的塞子
plug with inflatable sleeve for the sealing of boreholes or wells
暂无补充释义。
相关词条
phone plug
platelet plug (platelet )
vaginal plug
plug
ear plug
nasal plug
air-surface gap sparking-plug
plug with inflatable sleeve for the sealing of boreholes or wells
暂无补充释义。
central granule，central plug
phone plug
platelet plug (platelet )
vaginal plug
plug
ear plug
nasal plug
air-surface gap sparking-plug