Big efficiency gains will come only if Europe's carbon cap includes housing and transport.
只有欧洲碳限制把家用和交通纳入其中，高效的收益才能实现。
2
The two dowel pins align the cap and base of the housing.
用两个定位销将座罩和轴承座基础对准。
3
The protective housing has a lower part with at least one suitably shaped cavity for holding the metering unit (s) in a stable position and a cap-type upper part.