bottom sub造句

• The favorable values in the table below justify the choice of materials typically used for multi-junction solar cells : InGaP for the top sub-cell ( E g = 1.8-1.9 eV ), InGaAs for the middle sub-cell ( E g = 1.4 eV ), and Germanium for the bottom sub-cell ( E g = 0.67 eV ).
• Normal mud motor construction consists of a top sub, which connects the mud motor to the drill string; the power section, which consists of the rotor and stator; the transmission section, where the eccentric power from the rotor is transmitted as concentric power to the bit using a constant-velocity joint; the bearing assembly which protects the tool from off bottom and on bottom pressures; and the bottom sub which connects the mud motor to the bit.