The phrase "mainly handle" is correct and usable in written English.
You can use it when you want to express that something primarily takes care of or deals with something. For example, "This department mainly handles customer support inquiries."
Emergencies like hurricanes are exactly the kinds of things that food banks should mainly handle, he said.
To provide mobile phone a web-based environment and capability to handle HTTP messages, a simple web server, which will mainly handle HTTP request from client and sends response back, should be deployed on it.
Furthermore, in the overlaid HetNet deployment of the macro cell and small cell, the main responsibility for the small cells will be the maximum offloading of higher quality of services (QoS) while the macro cell will mainly handle the high-mobility users or the guaranteed lower QoS.
We have had a presumption that email messages between FSHS' physicians and their patients mainly handle patient care.
The greenhouse environment is different from e.g. agricultural environments as greenhouse workers mainly handle growing plants in enclosed environments while agricultural workers may work with animals or in open fields.
The old terminal at Hongqiao airport, which mainly handles domestic flights, is hopelessly congested.
Los Matadores mainly handled Harper and Rowan while Big Show tended to Bray Wyatt.
The airport is Sweden's fifth largest, and around 100km (60 miles) from Stockholm, which mainly handles low-cost airlines.
They contend that her years as an assistant attorney general for the state have been spent mainly handling mundane matters like violations of state rules about dock sizes.
Although he mainly handled administrative functions at Time Warner before the merger, Mr. Parsons became co-chief operating officer in charge of its music and film divisions during 2000 and 2001, when AOL and Time Warner were integrating the two companies.
Mr. Gaffney, who graduated from Fordham Law School in 1969, spent four years as an F.B.I. agent and then began practicing law in 1973, mainly handling commercial litigation and real estate matters.
