Why is the xpath query outputting 20 repetitions?

Question

ruby

There is a page with a list of products. You need to pull out a link to each product. ( https://www.petsonic.com/snacks-huesos-para-perros/)
The expression I made prints all the links, but repeats 20 times. Where is the error in the expression?
(doc / "//div[@class='left-block']/div/*").each do |row|
product_link = (row / "//a[@class='product_img_link']/@href")
puts product_link

Answer 1

Probably the first expression selects 20 products and enters the loop
AND the second expression also selects 20 products
ps Why not select links right away?
//div[@class='left-block']/div//a[@class='product_img_link']/@href
//div[@class="productlist"]//a[@class="product- name"]/@href