booklet - hkis
TRANSCRIPT
https://www.bd.gov.hk/tc/building-works/minor-works/index.html
https://www.hkis.org.hk/tc/division_bsd.html?id=21
TRANSCRIPT
https://www.bd.gov.hk/tc/building-works/minor-works/index.html
https://www.hkis.org.hk/tc/division_bsd.html?id=21