-
1
-
2
Water firm uses new technology to lay pipes with minimal digging
Cyhoeddwyd yn Manila Bulletin (2007)Erthygl -
3
Water firms uses new technology to lay pipes with minimal digging
Cyhoeddwyd yn Manila Bulletin (2007)Erthygl -
4
Processing and characterization of recycled plastic aluminum laminates impregnated with with organoclay as potential landfill liner
Cyhoeddwyd 2006Traethawd Ymchwil -
5
-
6
Construction of linings for reservoirs, tanks, and pollution control facilities
Cyhoeddwyd 1977Llyfr