Note the material and anticorrosion requirements of Sand Scraper, Harrower, Otherwise supplied according to carbon steel with normal anticorrosion.

分别注机、耙机的材质和防腐要求，不注表示均按碳和普通防腐订货。

The improved performance of anticorrosion was resulted from the increase of coating density, the decrease of open hole percentage and pylome numbers.

这是由于纳米掺杂使涂层密度，孔率、通孔率降低，组织均匀性所致。