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排名

rigid centralizer

184

3.0

cement basket

99

1.8

bow centralizer

75

17.1

casing centralizer

67

36.0

circulating swage

62

2.8

casing centralizers

39

33.4

bow spring centralizer

36

9.4

casing centralizer manufacturers

33

22.1

drill pipe cement head

31

22.0

float shoe

29

37.3

casing slip manufacturers

28

36.1

api casing centralizer

28

30.5

roller rigid centralizer

26

1.2

china stopping plug manufacturers

26

44.9

cementing plugs

25

24.7

float collar

25

43.2

cement baskets

23

6.5

oilfield roller rigid centralizer

21

3.5

roller rigid centralizer producer

20

1.5

bow spring centralizers

20

28.2

oilfield rigid centralizer

20

5.7