shannxi hainaisen petroleum technology Co.Ltd

Date: 2nd March 2016
Mae 91/2"HS952XA ansawdd da API Specs isaf pris petroliwm corff dur pwyllgor penderfyniadau cynllunio dril darnau
ymarfer corff dur, ansawdd da, pris isaf, petroelum dril, graig galed dril, cerrig drilio darnau, dril pwyllgor penderfyniadau cynllunio, dril diemwnt
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