Are drayage trucks required to enter and exit through a designated entrance and exit?

车是从指定进出口出入吗?

They are engaged in import and export.

他们做进出口贸易。

Through the HuangPu Customhouse verifies and authorizes, we have qualification to do the Import and Export for Inspection and clearance of goods .

经黄埔海关审核批准，具备代理进出口报关报检资格。

Well equipped, these instruments feature: multiple entrance and exit ports, high precision wavelength drives, extended range operation, Echelle, and oversize grating mounting capabilities.

这些良备特点是：多重进出口，波长驱动，可拓展操作范围，阶梯光栅，大光栅挂载能力。