pole's rope and chisel were practical drilling technologies. salt was an essential commodity for preserving food and extracting it from brine was a simple process. inin what is now west virginia, salt brine drillers david and joseph ruffner took months to drill through feet of bedrock to a total depth...
commission (neafc), in the north sea, and in waters under the jurisdiction of mauritania, angola, and guinea. in , the national fleet consisted of registered vessels with a combined gross tonnage of gt, and a total power of kw. two thirds of the fleet are aged years and over. in recent years there has...
commission (neafc), in the north sea, and in waters under the jurisdiction of mauritania, angola, and guinea. in , the national fleet consisted of registered vessels with a combined gross tonnage of gt, and a total power of kw. two thirds of the fleet are aged years and over. in recent years there has...
commission (neafc), in the north sea, and in waters under the jurisdiction of mauritania, angola, and guinea. in , the national fleet consisted of registered vessels with a combined gross tonnage of gt, and a total power of kw. two thirds of the fleet are aged years and over. in recent years there has...
commission (neafc), in the north sea, and in waters under the jurisdiction of mauritania, angola, and guinea. in , the national fleet consisted of registered vessels with a combined gross tonnage of gt, and a total power of kw. two thirds of the fleet are aged years and over. in recent years there has...
commission (neafc), in the north sea, and in waters under the jurisdiction of mauritania, angola, and guinea. in , the national fleet consisted of registered vessels with a combined gross tonnage of gt, and a total power of kw. two thirds of the fleet are aged years and over. in recent years there has...
commission (neafc), in the north sea, and in waters under the jurisdiction of mauritania, angola, and guinea. in , the national fleet consisted of registered vessels with a combined gross tonnage of gt, and a total power of kw. two thirds of the fleet are aged years and over. in recent years there has...
in singapore / r. chou coastal aquaculture in thailand / s. tookwinas, n. srichantulk & c. choongan prospects for seafarming and searanching in southeast asia overview of seafarming and searanching technology in japan / s. umezawa seafarming and searanching in the philippines / m.n. delmendo seafarming...