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Product Parameters Annular BOP Model JD-FH28-21 JD-FH35-21 JD-FH18-35 JD-FH28-35 JD-FH35-35 Bore Dia. mm 280 346 180 280 346 in 11 135/8 7 11 135/8 Rated Working Pressure Mpa 21 21 35 35 35 psi 3,000 ...