Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
English
G
o
o
g
l
e
|
Forvo
|
+
西威尔斯值
测定材料滑动磨损的一种方法。用直径 8.5mm、端部镶碳化钨的小型钻孔机在预先切出岩样上钻孔,用20kg 的物体向钻头施力。 SJ 值是200转后钻出的深度,以1/ 10mm 表示。4 Siewers 8个钻孔的平均值选作 SJ 值。为测定 SJ 值,通常是平行于层理钻岩
expl.
Siewers J-value
SJ value
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Add
|
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Report an error
|
Get short URL
|
Language Selection Tips