instructors?of?the?military?training?team1?Ding?Yonggang?took?the?accordion?to?the?lens?of?the?Korean?people's?Army?art?troupe,?where?he?helped?fix?the?accordion?speaker?lid,?reset?good?sound,?happy?with?his?friendship,?and?municate?the?accordion?playing?skills,?but?also?learned?the?first?Korean?classic?song?\"Ali?lang\".lens?2?accordion?repaired,?after?supper?every?day?and?hear?back?hillside?accordion.lens?3?mission?every?year?to?organize?military?backbone?training,?Ding?Yonggang?has?participated?in?several?training,?he?later?provided?from,?to?the?teacher's?identity?to?the?team.?This?is?the?transfer?of?northern?army?military?technology.lens?4?he?pack?on?the?back?of?the?luggage?to?the?captain.lens?5?team's?training?ground,?Ding?Yonggang?carrying?a?bag?of?explosives?manufactured?detonator?son,?shellburst,?walked?a?few?steps?each?point?with?a?detonator?son?explosives,?a?left,?then?ignite?the?next.6?burstpoint?lens?as?people?must?be?brave?and?resourceful,?only?to?let?the?staff?to?see?the?burst?point?mand?training,?but?also?pay?attention?to.lens?7?to?calculate?the?angle?of?artillery?shelling,?to?estimate?the?distance?to.?Trainees?from?each?unit,?looking?for?a?bomb?point?around?1000?meters?from?the?bomb?point,?correct?the?target.lens?8?saw?Ding?Yonggang?with?a?point?out?of?explosives,?twenty?meters?away,?to?lie?down,?and?burst?point?explosion?display?fully,?and?then?point?to?another.lens?9?artillery?correction?training?shooting,?50s?puter?is?not?enough,?modern?puter?technology?has?bee?very?rich,?do?not?need?to?make?the?staff?on-site?calculation,?artillery?and?trigonometric?function?automatic?operation,?then?no?more?manual?operation,?must?train?precision.10?lens?units?chosen?to?participate?in?the?training?of?soldiers?are?mostly?graduated?from?junior?high?school?diploma,?they?learned?about?his?image?of?the?trigonometric?function,?in?addition?to?the?field?artillery?operation?process,?but?also?teach?them?the?principle?calculation?formula?carefully,?to?participate?in?the?training?of?people?from?the?learned?theory,?see?mathematics?in?practice.11?class?Ding?Yonggang?hand?lens?with?chalk?on?the?blackboard?to?explain:?\"can?accurately?hit?the?target?when?shooting,?to?see?the?muzzle?pointing?guns?are?not?allowed,?because?far?from?the?goal?of?influencing?factors,?shooting,?so?the?artillery?group?equipped?with?scout?and?scout?for?observation?and?calculation?between?gun?with?the?distance?to?the?target?and?all?kinds?of?data.?The?various?data?given?by?the?artillery?is?called?firing?data.\"lens?12?Ding?Yonggang?lecture?image,?analogy?is?appropriate,?to?participate?in?training?the?students?quickly?mastered.lens?13?Ding?Yonggang?thought?of?learning?theory?of?artillery?fire?when?difficult,?if?not?their?own,?how?can?stand?on?the?podium?for?everyone.?He?continued?to?explain?the?trainees:?\"as?the?artillery?group?to?the?location?you?want?to?hide?and?maneuver,?so?the?artillery?group?often?can?not?be?directly?observed,?if?you?can?see?each?other,?each?other's?artillery?to?fire?you.\"lens?14?in?teaching?him?to?put?themselves?for?the?sake?of?students,?the?rapid?execution?of?instructions?by?the?captain,?Comrades?consistent.lens?15?to?new?students,?the?teacher's?patience?is?very?important,?Ding?Yonggang?careful?speaking:?\"no?artillery?reconnaissance?artillery?group?is?blind,?deaf,?so?the?Scouts?must?be?in?good?visibility,?sometimes?even?dangerous?place?to?build?the?enemy.\"lens?16?camouflage?on?a?hillside?in?the?mand?post,?Ding?Yonggang?was?in?his?hand?props,?the?students?stood?in?rows?in?the?middle?to?listen?to?his?explanation,lens?17?Ding?Yonggang?not?only?in?theory?class?for?the?trainees?to?do?a?detailed?explanation,?in?the?field?of?training?but?also?make?the?demonstration,?he?grabbed?the?gun?the?steering?wheel?in?the?mirror?and?the?observation?team?explained:?\"the?artillery?scout?weapon?is?artillery?reconnaissance?and?steering?mirror,?calculated?on?the?basis?of?soldiers.\"?The?students?stood?in?the?two?row,?taking?notes?carefully.The?students?18?shot?Ding?Yonggang?lying?in?a?behind,?he?explained?patiently?for?just?learned,?without?reservation?of?their?years?of?college?core,?all?taught.lens?19?Ding?Yonggang?stressed?the?need?to?seriously?study?and?research?college?is?the?core?and?gun:?\"the?distance?between?the?target?for?a?triangle?edge,?gun?positions?or?observation?points?and?adjacent?edge?distance,?distance?between?observation?point?target?and?the?bevel?angle?of?the?observation?point,?the?target?angle,?this?angle?is?important?the?artillery.\"In?mathematics?lens?20?artillery