plopijne lujvo

pi1=po2 is a staple for holding together pi2, made of pi3

Conceivably this might include a paper fastener as well. See plopijnytci for stapler.

In notes:

plopijnytci
t1 is a stapler.
relpijne
x1 is a staple/two-pronged fastener for holding together x2, made of x3.