少女初婚真人版在线观看|两个人激烈打扑克的视频|免费小说在线看|苹果视频社区下载|精品免费人成视频|欧美丰满一区二区三区|美女脱了看到

Features:

1. Capable of holding top and bottom plugs simultaneously. Used for cementing with top and bottom plugs, or for continuous two-stage cementing.

2. Quick installation casing adapter at bottom is good for convenient fixing of cement head and casing head.

3. Two plug release indicator reveals visual indication of plug passing.

4. Large ID of plug container and balance pipe designing allows easy open of plug retain pins.