The phrase "a number of main" is not correct in standard written English.
It is typically used when referring to several primary or significant items or concepts, but it needs to be rephrased for clarity.
Example: "There are a number of main factors to consider when making this decision."
Alternatives: "several key" or "a few primary".
A number of main avenues that lead through the city cross the square.
Between subject MANOVA analyses revealed a number of main effects and interactions.
The disruption will affect services out of a number of main London stations including London Bridge, where there will be a 16-day part closure for work involving the £6.5bn Thameslink programme.
Weirdly, given all the pre-match talk about street food and Indian tapas, there are no starters on the restaurant menu – just a number of main course dishes, served in tasting portions (though not, at £9-£15.50 a pop, at tasting prices).
Although, the initial purpose of the survey was to assess the perception and the expectation of the employers on employability skills, the research also addressed a number of main questions regarding the level of requirement of engineering employability skills according to the needs of their industries.
There are a number of main ideas to be investigated.
Today Kharkiv retains its role as a communications centre: it is a large rail junction, with several trunk lines converging on it and a number of main-line stations.
We notice that different values of β characterize a number of main-stream flows.
Investigations of a number of mine main fan installations have determined their assemblage to be, in general, very energy inefficient.
A number of significant main effects were found for the four independent variables, all of them consistent with the analyses conducted at the start of the internship.
While isolation is a strong means of mitigation, it also challenges a number of the main principles of cloud computing.
