²é¿´: 826  |  »Ø¸´: 7

Íè×Óryan

гæ (³õÈëÎÄ̳)

[ÇóÖú] ÈçºÎ»Ø¸´Éó¸åÈ˵ÄÕâ¸ö¹ØÓÚ¹¤×÷ƵÂʵÄÎÊÌ⣿

Éó¸åÈËÌáÁ˸ö¹ØÓÚ¹¤×÷ƵÂʵÄÎÊÌâ
The ultrasonic frequency was written as 20 to 25 kHz. Why does the frequency change? Usually, the value is constant.
ÎÒ²ÉÓõÄÊdz¬Éùϸ°û·ÛËéÒÇ£¬ÃúÅÆÉÏдµÄ¹¤×÷ƵÂʾÍÊÇ20-25KHz£¬µ«Êµ¼Ê²Ù×÷ÖÐÎÒ¸ù±¾¾ÍûÓÐÓõ½¹¤×÷ƵÂÊ£¬Ö»µ÷½ÚÁ˲»Í¬¹¦ÂÊ£¬Ôõô»Ø´ðÆÀÉóµÄÕâ¸öÎÊÌâÄØ£¿
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Íè×Óryan

гæ (³õÈëÎÄ̳)

×Ô¼º¶¥Ò»¶¥°¡£¬ÔÚÏßµÈ~~~
2Â¥2012-11-26 12:22:41
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

nono2009

³¬¼¶°æÖ÷ (ÎÄѧ̩¶·)

No gains, no pains.

ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐã°æÖ÷

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Íè×Óryan: ½ð±Ò+2, ¡ï¡ï¡ïºÜÓаïÖú 2012-11-29 19:10:13
Èç¹ûÓÐÊý¾Ý¼Ç¼µÄ»°£¬Ö±½Ó¸ø³öʵÑéÖеľßÌ寵ÂÊÖµ°É
3Â¥2012-11-26 12:34:26
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Íè×Óryan

гæ (³õÈëÎÄ̳)

ÒýÓûØÌû:
3Â¥: Originally posted by nono2009 at 2012-11-26 12:34:26
Èç¹ûÓÐÊý¾Ý¼Ç¼µÄ»°£¬Ö±½Ó¸ø³öʵÑéÖеľßÌ寵ÂÊÖµ°É

µ«ÊµÑéÖÐÎÒÒ²Ö»Êǵ÷½ÚÁËÒÇÆ÷µÄ¹¦ÂÊ£¬¹ØÓÚÕâ¸ö¹¤×÷ƵÂÊÊÇѹ¸ùû¹Ü°¡£¬±¾À´Ö»ÊǰÑÒÇÆ÷µÄ»ù±¾ÐÅϢд³öÀ´£¬Ã»Ïëµ½³ÉΪÆÀÉóµÄÎÊÌâÁË
4Â¥2012-11-26 12:40:55
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

nono2009

³¬¼¶°æÖ÷ (ÎÄѧ̩¶·)

No gains, no pains.

ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐãÇø³¤ÓÅÐã°æÖ÷

ÒýÓûØÌû:
4Â¥: Originally posted by Íè×Óryan at 2012-11-26 12:40:55
µ«ÊµÑéÖÐÎÒÒ²Ö»Êǵ÷½ÚÁËÒÇÆ÷µÄ¹¦ÂÊ£¬¹ØÓÚÕâ¸ö¹¤×÷ƵÂÊÊÇѹ¸ùû¹Ü°¡£¬±¾À´Ö»ÊǰÑÒÇÆ÷µÄ»ù±¾ÐÅϢд³öÀ´£¬Ã»Ïëµ½³ÉΪÆÀÉóµÄÎÊÌâÁË...

ÄÇÏë°ì·¨ÖØÐÂÈ·¶¨Ò»ÏÂÆµÂʰɣ¬³ý·ÇÄãÄÜ˵Ã÷ʵÑé½á¹ûÓëÆµÂÊÎÞ¹Ø
5Â¥2012-11-26 12:42:53
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

liaoshibo

Òø³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Íè×Óryan: ½ð±Ò+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-11-29 19:10:26
Äã¾Í˵ƽÂÊÊǶ¨Öµ£¬²»±ä¡£ÔÙ¿´¿´Ä¬ÈÏµÄÆµÂÊÊǶàÉپͿÉÒÔÁË¡£
ÎÒ¾ÍÊÇÎÒ£¬ÄãÒ²ÊÇÄã¡£ÎðÄ£·Â£¬×Ô³¬Ô½¡£
6Â¥2012-11-26 12:44:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

nuaawq

ÖÁ×ðľ³æ (ÖªÃû×÷¼Ò)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Íè×Óryan: ½ð±Ò+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-11-29 19:10:32
Èç¹ûÂ¥Ö÷ÓÐÊý¾Ý¼Ç¼µÄ»°£¬¿ÉÒÔ¸ø³öʵÑéÖеľßÌ寵ÂÊ¡£
7Â¥2012-11-26 12:45:25
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Íè×Óryan

гæ (³õÈëÎÄ̳)

лл¸÷룬ÎÒ»¹ÊÇȥȷ¶¨Ò»ÏÂÆµÂÊ£¬ÒѾ­±»ÆÀÉóµÄ¸÷ÖÖÎÊÌâ¸ã»èÁË~~~
8Â¥2012-11-26 12:54:30
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ Íè×Óryan µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 0703 ÎïÀí»¯Ñ§µ÷¼Á +3 ÎÒ¿ÉÒÔÉϰ¶µÄ¶Ô 2026-03-13 5/250 2026-03-16 10:50 by ÎÒ¿ÉÒÔÉϰ¶µÄ¶ÔÂ
[¿¼ÑÐ] 085600²ÄÁÏÓ뻯¹¤ Çóµ÷¼Á +12 enenenhui 2026-03-13 13/650 2026-03-16 08:30 by Linda Hu
[¿¼ÑÐ] 311Çóµ÷¼Á +6 ¶¬Ê®Èý 2026-03-15 6/300 2026-03-16 08:00 by wang_dand
[¿¼ÑÐ] Áº³ÉΰÀÏʦ¿ÎÌâ×é»¶Ó­ÄãµÄ¼ÓÈë +6 һѼѼӴ 2026-03-14 7/350 2026-03-15 22:12 by Winj1e
[ÎÄѧ·¼²ÝÔ°] »ï°éÃÇ£¬×£ÎÒÉúÈÕ¿ìÀÖ°É +15 myrtle 2026-03-10 24/1200 2026-03-15 21:16 by ËÕÖÝ_¶ººÅ
[¿¼ÑÐ] 274Çóµ÷¼Á +4 ʱ¼äµã 2026-03-13 4/200 2026-03-15 15:29 by Rambo13
[¿¼ÑÐ] ±¾¿ÆÄϾ©´óѧһ־Ը´¨´óҩѧ327 +3 ÂóÌï¸ûÕß 2026-03-14 3/150 2026-03-14 20:04 by ÍâÐÇÎÄÃ÷
[¿¼ÑÐ] 297Çóµ÷¼Á +4 ѧº£Æ¯²´ 2026-03-13 4/200 2026-03-14 11:51 by ÈÈÇéɳĮ
[¿¼ÑÐ] 266Çóµ÷¼Á +4 ѧԱ97LZgn 2026-03-13 4/200 2026-03-14 08:37 by zhukairuo
[¿¼ÑÐ] ÔÆÄϲƾ­´óѧÐÅϢѧԺ¼ÆËã»úѧ˶ר˶ѧλµã +3 zjptai 2026-03-10 5/250 2026-03-14 01:23 by ·ÉÐÐçù
[¿¼ÑÐ] 271Çóµ÷¼Á +10 ÉúÈçÏÄ»¨¡­ 2026-03-11 10/500 2026-03-14 00:35 by Âô±¨Ô±Ð¡Óê
[¿¼ÑÐ] Ò»Ö¾Ô¸ÖпÆÔº£¬»¯Ñ§·½Ïò£¬295Çóµ÷¼Á +4 Ò»Ñõ¶þµª 2026-03-11 4/200 2026-03-13 22:35 by JourneyLucky
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤085600µ÷¼ÁÇóÀÏʦÊÕÁô +9 jiaanl 2026-03-11 9/450 2026-03-13 20:22 by JourneyLucky
[¿¼ÑÐ] Çóµ÷¼Á +3 ³ÌÓ꺼 2026-03-12 3/150 2026-03-13 15:06 by JourneyLucky
[¿¼²©] 26¶Á²© +4 Rui135246 2026-03-12 10/500 2026-03-13 07:15 by gaobiao
[¿¼²©] 2026Ä격ʿÉêÇë +3 QwQwQW10 2026-03-11 3/150 2026-03-12 17:58 by gxch43
[¿¼²©] ¶Á²©ÉêÇë +5 ¸Ðdd 2026-03-10 7/350 2026-03-11 17:02 by QGZDSYS
[¿¼ÑÐ] 085602»¯¹¤Çóµ÷¼Á +7 ¶­boxing 2026-03-10 7/350 2026-03-10 17:07 by BruceLiu320
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á +3 Èýdd. 2026-03-10 3/150 2026-03-10 15:45 by peike
[¿¼ÑÐ] 294 Ó¢¶þÊý¶þÎﻯ Çóµ÷¼Á +6 Ã×·¹ÍŲ»ºÃ³Ô 2026-03-09 6/300 2026-03-09 23:55 by barlinike
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û