An elastomer with great resistance to gas permeation can serve as inner tubes, gas hoses, tubing.

猜你喜欢

• In 1964，（）won the Nobel Peace Prize for combating racial inequality through nonviolent resistance.
• Sorghum has strong ability of drought resistance.It can not only resist soil drought， but also atmospheric drought.
• The cold resistance of Japonica Rice is stronger than that of Indica Rice.
• （）strength may be defined as the measured maximum resistance of a concrete or mortar specimen to axial loading.
• Which of the following structures contains genes for enzymes and antibiotic resistance?