元旦

Each of the filter calibration standards have been analysed 5 times using Electroformed sieves traceable to NIST and NPL.

每中过滤校准标准颗粒都会用电铸筛，根据 NIST 和 NPL 分析5次。

In order to create a good propagandistic opportunity for suppliers of advance technology and equipment, this thesis collection provides a certain number of advertising positions for them.

另外，此次大会论文集专门为世界优秀技术、设备供应商提供一定数量的广告版位，为供应商的更广泛的宣传提供良机。