不定詞の形容詞的用法には２種類あり、（１）限定用法、（２）叙述用法。（２）はもちろん主格補語です。 There are two ways of using the infinitive as an adjective, 1. attributive, 2. predicative. Naturally 2. is a subject complement.
In addition to the general curriculum there are tutorials in the essentials of machinery, training is also carried out for skills in and learning how to use the various types of machinery.
Japanese Dictionary
