A.12mm B.14mm C.16mm D.18mm
A.打磨、防腐、刷防銹漆、刷銀粉漆 B.防腐、打磨、刷銀粉漆、刷防銹漆 C.刷銀粉漆、刷防銹漆、打磨、防腐 D.打磨、防腐、刷銀粉漆、刷防銹漆
A.0.5 B.1 C.1.5 D.2