So generally, orientation in many books they show the orientation exactly similar in the primary as well as secondary to show which is actually coupled to which one ok.
सामान्यत: बर् याच पुस्तकांमधील अभिमुखता प्राथमिक तसेच दुय्यम क्रमांकाशी समान दिशेने दाखवतात जे प्रत्यक्षात कोणत्या बरोबर जोडले गेले आहेत.