To ensure proper operation, this valve must be installed by a qualified service technician or licensed plumbing contractor in accordance with these instructions and local plumbing codes and standards.
为确保设备安装正确性，本安全阀安装须由有资格证书的管道承包商或维修技术人员按照说明书及其他相应规定进行。
Source qualified supplier & sub-contractor, and carry out supplier evaluation.
寻找有资质的供应商和承包商，并开展供应商评估工作。
The Sub-Contractor shall employ a qualified surveying engineer for this purpose, whose suitability (training certificate) is to be produced if requested by the Contractor.
如果承包商有要求，还需要提供其是适合该岗位的原因。
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