spin friction patching system, PERM - a plastic repair material, hole plugging device, and guidelines that can be used to prevent rupture of gas piping.
(hole; plugging; device, and guidelines) (guidelines; can be used; to prevent rupture of gas piping) (guidelines; to prevent; rupture of gas piping)
hole guidelines guidelines
plugging can be used to prevent
device, and guidelines
to prevent rupture of gas piping
rupture of gas piping