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darn o haearn rhychiog
a piece of corrugated iron

lapiwch mewn papur rhychiog.
wrap in corrugated paper.

blwch bwrdd rhychiog cryf neu becyn polystyren pwrpasol.
strong corrugated board box or purpose-designed polystyrene pack.

pecyn llyfr bwrdd ffibr rhychiog, â 2.<PROTECTED> o ofod ym mhob ochr.
corrugated fibreboard book pack, with 2.<PROTECTED> clearance at each end.

rhowch ddeunydd meddal o'u hamgylch a'u rhoi mewn pecyn rhychiog addas.
surround with cushion material and place in a suitable rigid outer container.

dylid pacio'r eitem mewn blwch rhychiog cadarn i sicrhau nad yw'n gollwng neu'n difrodi eitemau eraill.
the double-wrapped item should then be packed inside a rigid corrugated box to prevent leakage or tainting of other items.