简单介绍实验室认可的有关知识，从中可以看出计量认证（以下简称“认证”）和实验室认可的区别。提出了对铁路产品质检机构开展实验室“认可”的建议。 A brief introduction to the laboratory accreditation of knowledge, from which you can see the measurement certification (hereinafter referred to as “certification”) and the difference between laboratory accreditation. Put forward the railway product quality inspection agencies to carry out laboratory “approval” of the proposal.