Before revision: ship-wrecks, oil) History The mechanical grab, specifically the clamshell grab,Donald Routledge Hill, "Mechanical Engineering in the Medieval Near East", Scientific American, May 1991, p. 64-69 was invented by the Persian Banu Musa brothers and described in their Book of Ingenious Devices in the 9th century.
After revision: Bottom samplingship-wrecks, oil) History The mechanical grab, specifically the clamshell grab,Donald Routledge Hill, "Mechanical Engineering in the Medieval Near East", Scientific American, May 1991, p. 64-69 was invented by the Persian Banu Musa brothers and described in their Book of Ingenious Devices in the 9th century.