Hollow rock drill steel 凿岩钎杆用中空钢 ; 中空钢
hollow rock drill steel rolling 中空钢轧制
hollow rock bolt 空心岩石锚杆
Grouted Hollow Rock Bolt 中空锚杆注浆
Rock Hollow 街道地址
Hot Rock Hollow 街道地址
Since nothing ruins the illusion of solid rock quite like a hollow knock, contractors often backfill cavities with concrete.
因为没有废墟空心完全一样敲在固体岩石错觉，承办商经常用混凝土回填腔。
To strengthen loose surrounding rock, we can support and strengthen it by hollow grouting anchor so as to modify and stabilize its structure.
为了加固松动的围岩，可通过用中空注浆锚杆对其进行支护和加固，达到改良和稳固其结构的目的。
In order to enhance the service hfe of hollow steel for rock drill stem, the odd number side section shape hollow steel has been designed.
为了提高凿岩钎杆用中空钢的使用寿命，设计了奇数边截面形状的中空钢。
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