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The collar spear is a special fishing tool used to catch the fish whose top is a collar. It features that it can engage exactly the fish no matter when the collar is in larger casing annular space or in smaller pipe string.
The collar spear is a special fishing tool used to catch the fish whose top is a collar. It features that it can engage exactly the fish no matter when the collar is in larger casing annular space or in smaller pipe string.
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