steel doors & frames 钢门及门框 ; 钢门登门的框架
stainless steel doors and frames 不锈钢门及门框
A. Provide standard steel doors and frames manufactured by a single firm specializing in production of this type of work, unless otherwise acceptable to the Royal Commission.
提供的标准钢质门和门框需由同一家专业生产此类产品的企业，除此之外需得到皇家委员会的许可。
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