P3E1R1I1S1C3O1P3E1S1
16 points
PERISCOPES is validvalid
PERISCOPE, [n]
PERISCOPE, a device (e.g. a tube with mirrors) by which an observer can look at something which is not in the direct line of sight [n]
PERISCOPE, [n]
PERISCOPE, a device (e.g. a tube with mirrors) by which an observer can look at something which is not in the direct line of sight [n]