DIN EN 15398-2020 实施日期:2020-06-01 现 行 英文名:Resilient, textile, laminate and modular mechanical locked floor coverings (MMF) - Floor covering standard symbols
DIN SPEC 91422-2020 实施日期:2020-06-01 现 行 英文名:Requirements for planning and safety in the multifunctional high-tech working environment surgical theatre
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