Oops...

[alexpgp]

This huge document I'm working on talks about missile launchers, among other things, and at one point makes reference to a "параллелограммное устройство" on such devices, so naturally (and automatically) I just Googled

missile launcher parallelogram

which returned some hits referring to a "parallelogram structure" or "parallelogram mount."

You learn something new every day on this job. <grin>

That said, here's hoping my choice of search terms does not come back to bite me in the future! <wink>

Cheers...