前言
Unit 1Passage 1Pipeline Basics
Passage 2The Alaska Pipeline
Unit 2Passage 1Types of Natural Gas Pipelines
Passage 2The GIS Introduction
Unit 3Passage 1In?line Inspections （Smart Pig）
Passage 2Inspection of the Corrosion State of Underground
Pipelines
Unit 4Passage 1Pipeline Repairs
Passage 2How to Recognize a Natural Gas Leak
Unit 5Passage 1Reasons of Pipeline Corrosion
Passage 2Pipe Coatings
Unit 6Passage 1Valves
Passage 2Gas Hydrate Primer
Unit 7Passage 1Pipeline Construction (Ⅰ)
Passage 2The Pipe Jacking (Ⅰ)
Unit 8Passage 1Pipeline Construction (Ⅱ)
Passage 2The Pipe Jacking (Ⅱ)
Glossary
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