上海优强石油科技有限公司
Exhibit Profile：
Packer Y541-173, Safety valve YQTRS-5E(3.5), Stretching packer Y441-152C, Packer Y521-115, Electric Submersible Plump packer Y441-217D, Mechanical bridge plug and fishing tool Y445-149, Switch sliding sleeve YQSSD, Mechanical packer Y422-142
Packer Y541-173, Safety valve YQTRS-5E(3.5), Stretching packer Y441-152C, Packer Y521-115, Electric Submersible Plump packer Y441-217D, Mechanical bridge plug and fishing tool Y445-149, Switch sliding sleeve YQSSD, Mechanical packer Y422-142
Website：http://www.extrong.com/