In view of the shorter service period of spring cartridge, new raw material, carburizing bearing steel and new heat-treatment process was used in manufacture of spring cartridge.
针对弹簧夹头寿命较低现状，提出采用渗碳轴承钢材料及相应的热处理工艺制作弹簧夹头。
The concrete perforated brick is a new type of bearing-wall material.
混凝土多孔砖是近年来兴起的新型承重墙体材料。
The concrete perforated brick is a new type of bearing-wall material.
混凝土多孔砖是近年来兴起的新型承重墙体材料。
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