Switching Diodes

Switching diode is the kind of diode for "open", "shut" in the circuit and special design and manufacture. It consists of a change to stop or by the deadline to conduction time required than the general diode short, common 2AK, 2DK series, mainly used for the electronic computer, pulse and switch circuit.


1054 Unknown column 'r.reviews_id' in 'order clause'
in:
[select p.products_image, pd.products_name, p.products_quantity, p.products_id, p.products_type, p.master_categories_id, p.manufacturers_id, p.products_price, p.products_tax_class_id, pd.products_description, IF(s.status = 1, s.specials_new_products_price, NULL) as specials_new_products_price, IF(s.status =1, s.specials_new_products_price, p.products_price) as final_price, p.products_sort_order, p.product_is_call, p.product_is_always_free_shipping, p.products_qty_box_status from products_description pd, products p left join manufacturers m on p.manufacturers_id = m.manufacturers_id, products_to_categories p2c left join specials s on p2c.products_id = s.products_id where p.products_status = 1 and p.products_id = p2c.products_id and pd.products_id = p2c.products_id and pd.language_id = '1' and p2c.categories_id = '612' order by COUNT(r.reviews_id) desc limit 0,30]