They comply with the accident prevention regulation on compressors vbg 16 and thus fulfil the safety requirements of en 837 - 3 它符合压缩机vbg16事故预防规章规定,因此符合en 837 - 3的安全要求。
3.
They comply with the accident prevention regulation on compressors vbg 16 and thus fulfil the safety requirements of en 837 - 3 s2 它符合压缩机vbg16事故预防规章规定,因此符合en 837 - 3 s2的安全要求。