Occupational safety standards system. Personal protective equipment against falls from a height. Descender devices for rescue. General technical requirements. Test methods
Vodkas and special vodkas. Ion chromatography method of determination of potassium, sodium, ammonium, calcium, magnesium, strontium cations and fluorides, chlorides, nitrates, nitrites, phosphates and sulphates anions mass concentration
System of national standards for quality of telecommunication services. Quality of services of local, long-distance and international telephone communication. Normative values for quality indices of telephone calls
€10
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