1. Gade aparans la. Mo yo enprime oswa depoze ak mak sou aparans nan Pwodwi pou Telefòn orijinal yo klè ak fòmèl, pandan y ap aparans nan pwodwi yo kontrefè se ki graj.
2. Dapre koulè a, sifas kèk pati orijinal yo dwe espesifye ak yon koulè sèten. Nan ka lòt koulè, yo se pati fo ak defo.
3. Gade teksti an. Materyèl yo nan Pwodwi pou Telefòn orijinal yo se materyèl ki kalifye selon kondisyon yo ki konsepsyon, ak pi fò nan pwodwi yo fo yo ranplase pa materyèl bon mache ak enferyè.
4. Gade nan biznisman ilegal yo ki tou senpleman trete pati yo fatra, tankou demonte, asanble, asanble, penti, elatriye, ak Lè sa a, vann yo kòm pwodwi ki kalifye ilegalman jwenn gwo pwofi.
5. Look at the "engagement". If the rivets of the clutch plate are loose, the brake hose is degummed, the joints of electrical parts are desoldered, and the joints of the paper filter element are separated, it cannot be used.
6. Look at the identification. Some regular parts are marked with some marks, such as timing gear mark, piston top mark and other assembly marks, which are used to ensure the correct installation of parts. If there is no part, you can't buy it.
7. Look at the "storage" of auto parts. If there are problems such as dry crack, oxidation, discoloration mirror or aging, it may be caused by poor environment, long storage time, poor material itself and so on.
8. Gade nan anbalaj la, anbalaj la nan Pwodwi pou Telefòn orijinal yo jeneralman estanda, espesifikasyon estanda inifye, ak enprime a se klè ak fòmèl. Sepandan, anbalaj la ak enprime nan pwodwi kontrefè se relativman pòv, epi li se souvan fasil jwenn defo nan anbalaj la.
9. Gen kèk pati enpòtan, espesyalman asanble, tankou karburateur, distribitè, dèlko, elatriye, yo jeneralman delivre ak enstriksyon ak sètifika pou gide itilizatè yo nan enstalasyon, itilizasyon ak antretyen. Si yo pa, yo se sitou fo ak pwodwi defo.
10. Look at the protective layer. In order to facilitate storage and prevent parts from bumping, the parts have protective layers before leaving the factory. For example, bushings, large and small bearing shells, pistons and valves are generally protected with paraffin to avoid surface damage. If there is no protective layer on the surface of these important accessories, they are mostly "parallel goods".
11. In order to ensure the smooth posturing and normal operation of the vehicle, the normal assembly parts must be complete and intact. Individual small parts on some assemblies are missing, which are generally "parallel goods", which makes it difficult to load. The whole assembly is often scrapped due to the shortage of individual small parts.
12. Lè w ap achte pati oto dapre espesifikasyon yo, li nesesè pou chèche konnen paramèt teknik prensipal yo, ak teknoloji espesyal la ta dwe ranpli kondisyon yo ki itilize. Aparans nan kèk pwodwi fo ak shoddy se prèske menm jan ak sa yo ki nan pwodwi yo reyèl, men li pa apwopriye enstale yo. Yo swa pi gwo oswa pi piti. Yo toujou satisfè ak itilizasyon yo epi kite danje kache nan aksidan.
13. Aparans nan pwodwi ak atizan konn fè pòv pafwa bon, men akòz teknoloji fabrikasyon pòv, fant, twou sab, enklizyon salop, burrs oswa monte desann yo fasil parèt. Pou egzanp, gasket la silenn ekstrè ak defòme, ki fasil lakòz ablation akòz sele ki lach, sa ki lakòz flit lwil oliv, flit lè ak flit dlo; Gen burrs sou sifas la k ap travay nan piston ak bag piston, ki se fasil rale silenn lan.