shannxi hainaisen petroleum technology Co.Ltd

Date: 2nd March 2016
83/4"HS642XA API ac ISO dur corff pwyllgor penderfyniadau cynllunio Dril i ddrilio olew yn dda
PWYLLGOR PENDERFYNIADAU CYNLLUNIO DRIL, DUR CORFF DRIL DID, LLAFN DRIL 6, DRIL MEDDAL CANOLIG TIPYN, OLEW DDA DRIL DID,
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