例句與造句

1. Where hydrates are likely to form ( most production is at risk of this ), the depth of the SCSSV ( surface-controlled, sub-surface safety valve ) below the seabed may be as much as 1 km : this will allow for the geothermal temperature to be high enough to prevent hydrates from blocking the valve.
2. It's difficult to find surface safety valve in a sentence. 用surface safety valve造句挺難的