loophole p n junction

p n junction

p n junction isolationp n

p n junction rectificationp n

P and N removal system

P and N removal

NTP

N、P use efficiency

N、P fertilizer

N、P

N Phenyl N′(sodium p aminobenzenesulfonate) thiourea

n p type coupled semiconductor

n p n transistorn p n

N P K Mg S

N P K fertilizer

N P K

n p junctionn p

N octyl N′ (sodium p aminobenzenesulfonate) thiourea