[susan53]

Hi Beatrix,
M75 has some parts LIKE model C68

Your final question gives it away. as is used to indicate that two things are equivalent, while like shows that they´re similar. Neatly summed up in the two sentences :
a) I work as a teacher
b) I work like a slave
In (a) I´m saying that I am a teacher - there´s no distinction between the words I and teacher whereas in (b) I´m simply comparing myself to a slave.

In your example, they aren´t the same parts, just the same type of parts - so it´s seen by the language as similarity rather than equivalence.


So as is often used together with the same - Her hair is the same colour as her mothers and in as..as.. constructions expressing equivalence or lack of it : He´s just as idiotic as always.

as can of course also be combined with such with the meaning "of a type" which makes it equivalent to likein its meaning of for example : I enjoy talking about certain aspects of grammar, like/such as the verb system and it´s probably this which causes the most confusion for students.

Hope that helps, and have a very happy Christmas.