目前中国使用的PM 2.5(大气中直径小于或等于2.5微米的颗粒物)监测设备和技术主要是依赖进口。

The equipment and technologies that China is using to monitor PM2.5 — fine particles 2.5 microns or less in diameter — are mainly from other countries.

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通过对进口切粒机动刀材质硬度分析和金相分析，确认其可使用的最小外圆直径。

Through analyzing material hardness and metallography of moving knife of import cutter, its minimum round diameter outside used is confirmed.

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进口工业网提供各种各样的中小型张力辊，挤压微管可达8英寸直径管道，配有轮胎，车轮，带配置。

We offer an assortment of pullers sized for the extrusion of micro tubing up to 8 "diameter pipe, with tire, wheel and belt configurations."

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