发布时间:2025-01-21 21:36:09
GCr15 和 GCr15SiMn都是滚动轴承钢。
GCr15是表示平均含铬量为1.5%的滚动轴承钢。
GCr15SiMn是表示除含铬1.5%外,还含有含量小于1.5%的硅、锰元素的滚动轴承钢。
GCr15一般用于直径25~50mm的滚珠。
GCr15SiMn一般用于直径50~100mm的滚珠,和直径大于22mm的滚柱。
我是个60岁的女人因家装修受到了楼层上下的围攻他们想出种种办法来对付我连政府部门都拿他们没
2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09新房屋结构装修图一是小箱子内的总闸左冷右热图二是热水器的图样图三是淋浴喷头左热右冷
2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09 2025-01-21 21:36:09