海词手机词典

The 2# rock detonator dynamite Cu-steel combined plate and testprocess of welding parameter are introduced.The particular semi-cylinder experiment method is introduced.The test result is applied in production and good benefit is obtained.

播放读音 播放读音

以上内容独家创作,受著作权保护,侵权必究

海词词典,十七年品牌