| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a collapse range determiner capable of accurately determining a collapse range by a simple method. <P>SOLUTION: A collapse range determiner comprises: first and second vertical pipe bodies 9, 4 vertically held, each closed at the upper end by a rubber plug 1 and at least partly transparent; a continuous connection pipe body 5 both ends of which are connected in communication with the end parts of the vertical pipe bodies 4, 9, respectively; a liquid 7 appropriately filled in the sealed spaces, namely, in the first and second vertical pipe bodies 9, 4 and the continuous connection pipe body 5; first and second liquid level markers 6, 3 each formed on a transparent part of each of the first and second vertical pipe bodies 9, 4 and showing a normal liquid level of the liquid 7; and a telescopic part 8 supported so as to be extensible and contractible in a vertical direction from and to the upper part of the first vertical pipe body 9. <P>COPYRIGHT: (C)2012,JPO&INPIT |
