roller centralizer

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Specification	type	OD(mm)	ID(mm)	Length(mm)
YDGF—41/2in×6in	I,II,III	145	116.5	200
YDGF—5in×6in	I,II,III	145	129	200
YDGF—5 1/2in×8 1/2in	I,II,III	205-210	142	200/300
YDGF—6 5/8in×8 1/2in	I,II,III	205-210	171	200/300
YDGF—7in×8 1/2 in	I,II,III	205-210	181	200/300
YDGF—7in×9 1/2in	I,II,III	225-235	181	200/300
YDGF—7in×9 5/8in	I,II,III	225-235	181	200/300
YDGF—9 5/8in×12 1/4in	I,II,III	300-305	248	200
YDGF—13 3/8in×17 1/2in	I,II,III	430-435	346	200

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