jhs
- 网络防水电缆
jhs-
The JHS Company is a National Grade-one Enterprise and National Key Hi-Tech. Enterprise , which is the largest manufacturer of petroleum drill bit in Asia with world advanced technology .
JHS公司是国家一级企业，国家重点高新技术企业，世界先进、亚洲最大的石油钻头制造商。
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A kind of borehole stabilizer , JHS , for hard and brittle shales is developed for solving the problem of instability of borehole in the Liaohe field .
针对辽河油田双南等地区井壁不稳定问题，研制了一种硬脆性泥页岩井壁稳定剂&JHS。
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Base on JM 14 type low speed winch , this paper changes from worm-worm wheel transmisson to straight spur gear transmisson . It becomes a new type JHS 140 type prop-pulling winch .
在现有的JM14型慢速绞车的基础上，将蜗杆蜗轮传动改为直齿圆柱齿轮传动，成为一种新型的JHS140型回柱绞车。