Because of the higher precision, it is also the challenge to fabricate optical waveguide with the submicrometer diameter and low loss. 但是由于对高精度的要求，制作亚波长直径的低损耗光波导仍然是种挑战。
Relevant operational practice has proven that the said new process is advantageous in producing largesized and heavy-walled shaped steel tubes with higher accuracy. 实践表明，该方法具有可以生产较高精度的大规格厚壁异型钢管的特点。
