Valves - materials for bodies , bonnets and covers - part 4 : copper alloys specified in european standards ; german version en 1503 - 4 : 2002 阀门.阀体阀盖和阀套材料.第3部分:欧洲标准规定的
Valves - materials for bodies , bonnets and covers - part 3 : cast irons specified in european standards ; german version en 1503 - 3 : 2000 ac : 2001 阀门.阀体阀盖和阀套材料.第3部分:欧洲标准规定的
They meet or exceed the following specifications developed through years of experience , research and laboratory tests 这些阀门满足或优于下列经过长期实践经验、研究和实验室测试发展起来的标准规定要求。
The sql - 92 standard states that any comparison against null does not evaluate to true or false , it evaluates to unknown Sql - 92标准规定：对null值的任何比较都不能取值为true或false ，而是取值为unknown 。
Many products from provincial , municipal identification , fully met the relevant industry standards of various performance indicators 产品多次经省，市级鉴定，完全达到了相关行业标准规定的各项性能指标。
This regulation prescribes the concentrations of benzene , toluene and dimethylbenzene in air forresidential area by gas chromatograph method 本标准规定了用气相色谱法测定居住区大气中苯、甲苯和二甲苯的浓度。
Concerned environment and facilities for the cmm installation must meet the requirement of the specifications before the installation 进行测量机的安装，需在满足供货方所要求环境条件符合标准规定的情况下才能进行。
This standard covers the standardization of dimensions of welded and seamless wrought 注 steel pipe for high or low temperatures and pressures 本标准规定内规管的尺寸，适用于高温高压或低温低压用已作钢制焊接与无缝管。
This standard stimulates the echnical requirements , experiment method , testing standard and method of packing , transporting and storing 本标准规定了镍片的技术要求、实验方法、检验标准、以及包装标准，运输和储存的方法。
Aimed at safeguarding workers ' rights , the standard defines universally applicable conditions and provides for an independent auditing process 为了维护职工的权利，该标准规定了普遍适用的条件，允许建立一个独立的审核程序。
