JPS63297001A - Continuous batcher plant - Google Patents

Continuous batcher plant

Info

Publication number
JPS63297001A
JPS63297001A JP13570387A JP13570387A JPS63297001A JP S63297001 A JPS63297001 A JP S63297001A JP 13570387 A JP13570387 A JP 13570387A JP 13570387 A JP13570387 A JP 13570387A JP S63297001 A JPS63297001 A JP S63297001A
Authority
JP
Japan
Prior art keywords
slurry
grout pump
empty
fluid
switching valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13570387A
Other languages
Japanese (ja)
Other versions
JP2603633B2 (en
Inventor
Kazuo Yanagihara
柳原 和夫
Akira Goshima
朗 五島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Sharyo Ltd
Original Assignee
Nippon Sharyo Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Sharyo Ltd filed Critical Nippon Sharyo Ltd
Priority to JP62135703A priority Critical patent/JP2603633B2/en
Publication of JPS63297001A publication Critical patent/JPS63297001A/en
Application granted granted Critical
Publication of JP2603633B2 publication Critical patent/JP2603633B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/02Controlling the operation of the mixing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

PURPOSE:To provide the easy maintenance of a device, while kneaded fluid may be continuously fed by a method in which an empty detecting sensor detects that the fluid to be kneaded in an agitation tank has been used up, and a switch valve controlling means controls the switch valve, whereby other mixer which is not empty is connected to a grout pump. CONSTITUTION:Both left and right mixers 1, 2 are provided respectively with motors 4, 6, and agitation blades 8, 9 are connected respectively to the rotation shaft of the motors 4, 6. When an empty detecting sensor 16 detects that the slurry as a kneaded fluid in a left agitation tank 12 has been used up, a switch valve 20 is exchanged, and a right agitation tank 14 which is not empty, is connected to a grout pump 22. When an empty detecting sensor 18 detects that the slurry in the right agitation tank 14 has been used up, the switch valve 20 is exchanged, and the left agitation tank 12 in which the slurry is being produced, is again connected to the grout pump 22. Consequently, by this continuous batcher plant, the slurry as the kneaded fluid may be continuously supplied without a specified agitator. The chipping operation is unnecessary and the maintenance is easy.

Description

【発明の詳細な説明】 発明の目的 [産業上の利用分野] 本発明は、スラリー、モルタル等の混線流体を連続的に
供給する連続式バッチャ−プラントに関する。
DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION [Industrial Application Field] The present invention relates to a continuous batcher plant that continuously supplies mixed fluids such as slurry and mortar.

[従来の技術] 従来より、建設等に用いるセメント、砂、ベントナイト
あるいは水等を攪拌した混練流体を生産するミキサとし
て、種々のミキサが知られている(実開昭59−980
8.特開昭59−220318、実開昭61−2982
7>。このミキサによる混練流体の生産は、バッチ生産
であり、混線流体を連続的に供給するために、混練流体
を攪拌しながら固化等を防止して貯蔵するアジテータを
備えた装置が知られている(特開昭60−101009
.6O−1996i3.6O−199614)。
[Prior Art] Various mixers have been known as mixers for producing a kneading fluid by stirring cement, sand, bentonite, water, etc. used in construction etc.
8. Japanese Patent Application Publication No. 59-220318, Utility Application Publication No. 61-2982
7>. The production of the kneading fluid by this mixer is batch production, and in order to continuously supply the kneading fluid, there is a known device equipped with an agitator that prevents solidification while agitating the kneading fluid and stores it. JP-A-60-101009
.. 6O-1996i3.6O-199614).

[発明が解決しようとする問題点] しかしながら、こうした従来の連続式バッチャ−プラン
トでは、ミキサ以外にもアジテータを設けなければなら
ず、装置が大型・複雑となると共に、ミキサは毎回給水
で洗浄されるが、アジテータ内には絶えず混線流体がは
いっており、時間の経過と共にアジテータの壁面等に付
着した混線流体が固化し、また、固化したものが成長し
て大きくなり、はつり作業を行なわないと装置の破損に
つながり、メンテナンスが大変であるという問題があっ
た。
[Problems to be solved by the invention] However, in such conventional continuous batcher plants, an agitator must be installed in addition to the mixer, making the equipment large and complicated, and the mixer must be cleaned with water every time. However, crosstalk fluid constantly enters the agitator, and as time passes, the crosstalk fluid that adheres to the walls of the agitator will solidify, and the solidified material will grow and become large, making it impossible to carry out chipping work. There were problems in that it led to equipment damage and maintenance was difficult.

そこで本発明は上記の問題点を解決することを目的とし
、はつり作業を行なうことなく、メンテナンスが容易な
連続式バッチャ−プラントを提供することを目的として
なされた。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and to provide a continuous batcher plant that does not require chisel work and is easy to maintain.

発明の構成 [問題点を解決するための手段] かかる目的を達成すべく、本発明は問題点を解決するた
めの手段として次の構成をとった。即ち、複数の攪拌槽
から吐出された混練流体をグラウトポンプにより連続的
に供給する連続式バッチャ−プラントにおいて、 前記複数の攪拌槽に設けられ、攪拌槽内の混線流体がな
くなったことを検出する空検知センサと、前記グラウト
ポンプと前記複数の攪拌槽の内のいずれかとを選択的に
連通ずる切換弁と、前記空検知センサにより、いずれか
の攪拌槽内の混線流体がなくなったことが検出されたと
きに前記切換弁を制御して、空でない他の攪拌槽と前記
グラウトポンプとを連通ずる切換弁制御手段と、を備え
たことを特徴とする連続式バッチャ−プラントの構成が
それでおる。
Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the present invention has the following structure as a means for solving the problems. That is, in a continuous batcher plant in which kneading fluid discharged from a plurality of stirring tanks is continuously supplied by a grout pump, a device is provided in the plurality of stirring tanks to detect when the mixing fluid in the stirring tanks is exhausted. An empty detection sensor, a switching valve that selectively communicates the grout pump with one of the plurality of stirring tanks, and an empty detection sensor detect that there is no cross-flow fluid in one of the stirring tanks. There is also a configuration of a continuous batcher plant characterized by comprising: switching valve control means for controlling the switching valve to communicate the grout pump with another stirring tank that is not empty when the grouting tank is .

[作用コ 前記構成を有する連続式バッチャ−プラントは、空検知
センサが攪拌槽内の混練流体がなくなったことを検出し
、切換弁制御手段が、切換弁を制御して、空でない他の
ミキサとグラウトポンプとを連通する。従って、アジテ
ータを必要とせずに、混練流体を連続的に供給すること
ができる。
[Function] In the continuous batcher plant having the above configuration, the empty detection sensor detects that the kneading fluid in the stirring tank has run out, and the switching valve control means controls the switching valve so that other mixers that are not empty are and the grout pump. Therefore, the kneading fluid can be continuously supplied without the need for an agitator.

[実施例] 以下本発明の実施例を図面に基づいて詳細に説明する。[Example] Embodiments of the present invention will be described in detail below based on the drawings.

第1図は本発明の一実施例である連続式バッチャ−プラ
ントの概略構成図である。この連続式バッチャ−プラン
トは、左ミキサ1と右ミキサ2とを備えており、また、
両左右ミキサ1,2は各々モータ4,6を備えており、
各モータ4,6の回転軸には各々攪拌羽根8.10が接
続されている。
FIG. 1 is a schematic diagram of a continuous batcher plant that is an embodiment of the present invention. This continuous batcher plant is equipped with a left mixer 1 and a right mixer 2, and
Both left and right mixers 1 and 2 are equipped with motors 4 and 6, respectively.
A stirring blade 8.10 is connected to the rotating shaft of each motor 4, 6, respectively.

また両左右ミキサ1,2の筒状の各左右攪拌槽12.1
4の下部には、混線流体としてのスラリーがないことを
検出する空検知センサ16,18が各々配設されている
In addition, the cylindrical left and right stirring tanks 12.1 of both left and right mixers 1 and 2
Empty detection sensors 16 and 18 for detecting the absence of slurry as a crosstalk fluid are disposed at the lower part of the fuel cell 4, respectively.

一方、両左右攪拌槽12,14は、外部信号に応じて流
入方向を切換可能な切換弁20を介してピストン式グラ
ウトポンプ22に接続されてる。
On the other hand, both left and right stirring tanks 12 and 14 are connected to a piston type grout pump 22 via a switching valve 20 that can switch the inflow direction according to an external signal.

このグラウトポンプ22は、ピストン部24の往復運動
に応じて、吸入側の一方のチェック弁25゜26を介し
てスラリーを吸入し、吐出側の一方のチェック弁27.
28を介してスラリーを連続的に吐出する。また、この
グラウトポンプ22のピストン部24は、油圧シリンダ
ー30に連結されている。この油圧シリンダー30は、
機械操作切換バルブ32を介して、可変音d形油圧ポン
プ34及び油タンク36に各々接続されている。この機
械操作切換バルブ32は、油圧シリンダー30の往復運
動に応じて切換えられる構成となっており、油圧ポンプ
34から作動油が供給されると、油圧シリンダー30は
連続して往復運動を繰り返す。また、油圧ポンプ34に
は、モータ38が連結されている。
The grout pump 22 sucks slurry through one check valve 25, 26 on the suction side and one check valve 27, 27 on the discharge side in accordance with the reciprocating movement of the piston portion 24.
The slurry is continuously discharged through 28. Further, the piston portion 24 of this grout pump 22 is connected to a hydraulic cylinder 30. This hydraulic cylinder 30 is
It is connected via a mechanically operated switching valve 32 to a variable sound D-type hydraulic pump 34 and an oil tank 36, respectively. This mechanical operation switching valve 32 is configured to be switched according to the reciprocating motion of the hydraulic cylinder 30, and when hydraulic oil is supplied from the hydraulic pump 34, the hydraulic cylinder 30 continuously repeats the reciprocating motion. Further, a motor 38 is connected to the hydraulic pump 34.

前述した空検知センサ16,18.モータ4゜6.38
.切換弁20は各々電子制御回路50に接続されている
。この電子制御回路50は周知のCPLJ52.ROM
54.RAM56を論理演算回路の中心として構成され
、外部との入出力を行なう入出力回路、ここではセンサ
入力回路58、駆動出力回路60等をコモンバス62を
介して相互に接続して構成されている。CPU52は、
空検知センサ16,18からの信号をセンサ入力回路5
8を介して入力し、この信号及びROM54゜RAM5
6内のデータに基づいて、CPU52は駆動出力回路6
0を介してモータ4.6,38゜切換弁20に駆動信号
を出力する。尚、本実施例では、論理演算回路構成とし
たが、単なるリレーからなる論理回路構成としても実施
可能である。
The sky detection sensors 16, 18 described above. Motor 4゜6.38
.. The switching valves 20 are each connected to an electronic control circuit 50. This electronic control circuit 50 is a well-known CPLJ52. ROM
54. It is configured with the RAM 56 as the center of a logic operation circuit, and input/output circuits for inputting/outputting data to/from the outside, in this case a sensor input circuit 58, a drive output circuit 60, etc., are connected to each other via a common bus 62. The CPU 52 is
The signals from the sky detection sensors 16 and 18 are sent to the sensor input circuit 5.
This signal and ROM54°RAM5
Based on the data in the drive output circuit 6, the CPU 52
A drive signal is output to the motor 4.6 and the 38° switching valve 20 via the motor 0. In this embodiment, a logical operation circuit configuration is used, but it is also possible to implement a logic circuit configuration consisting of a simple relay.

次に、前述した電子制御回路50において行なわれる処
理について、第2図のフローチャートに随って説明する
。本連続式バッチャ−プラントは、電源が投入されて、
運転が開始されると、まず、駆動出力回路60を介して
両モータ4,6に駆動信号が出力され、両モータ4,6
が駆動される。
Next, the processing performed in the electronic control circuit 50 described above will be explained with reference to the flowchart shown in FIG. This continuous batcher plant is powered on and
When the operation starts, first, a drive signal is output to both motors 4 and 6 via the drive output circuit 60, and both motors 4 and 6
is driven.

これにより両攪拌羽根8,10が回転されると共に、オ
ペレータにより左右攪拌槽12,14に所定量の水、セ
メントが投入されて、混線流体としてのスラリーが生産
される(ステップ100)。
As a result, both the stirring blades 8 and 10 are rotated, and a predetermined amount of water and cement are put into the left and right stirring tanks 12 and 14 by the operator, thereby producing slurry as a mixed fluid (step 100).

例えば、投入された水、セメントの量に応じて所定時間
まぜられて、スラリーが生産されると、モータ38が駆
動されて、油圧ポンプ34により、油タンク36から機
械操作切換バルブ32を介して油圧シリンダー30に作
動油が供給される。これにより油圧シリンダー30が往
復動されて、グラウトポンプ22が駆動される(ステッ
プ110)次に、駆動出力回路60を介して切換弁20
に駆動信号が出力され、左攪拌槽12とグラウトポンプ
22とを連通ずる位置に切換えられる。よって、グラ「
クトポンプ22には、切換弁20を介して左攪拌槽12
内のスラリーが、例えば吸入側の一方のチェック弁25
から吸入され、吐出側の一方のチェック弁28からスラ
リーが圧送される(ステップ120)。
For example, when slurry is produced by mixing water and cement for a predetermined period of time depending on the amount of water and cement that has been added, the motor 38 is driven and the oil is supplied from the oil tank 36 via the mechanically operated switching valve 32 by the hydraulic pump 34. Hydraulic oil is supplied to the hydraulic cylinder 30. As a result, the hydraulic cylinder 30 is reciprocated and the grout pump 22 is driven (step 110).
A drive signal is output to the left stirring tank 12 and the grout pump 22 are switched to a position where they communicate with each other. Therefore, Gra'
The left stirring tank 12 is connected to the left stirring tank 12 via the switching valve 20.
For example, the slurry inside the check valve 25 on the suction side
The slurry is sucked in from the slurry and pumped out from one of the check valves 28 on the discharge side (step 120).

続いて、空検知センサ16により、左攪拌槽12内のス
ラリーがなくなったことが検出されるまで、左攪拌槽1
2とグラウトポンプ22とが連通される。スラリーがな
くなったことが空検知センサ16により検出されるとく
ステップ130)、切換弁20が切換えられて、右攪拌
槽14とグラウトポンプ22とが連通される(ステップ
140)これにより、右攪拌槽14内のスラリーがグラ
ウトポンプ22から吐出される。従って、左攪拌槽12
が空となっても、右攪拌槽14のスラリーがグラウトポ
ンプ22から圧送され、スラリーが連続して供給される
Subsequently, the left stirring tank 1 continues until the empty detection sensor 16 detects that the slurry in the left stirring tank 12 is empty.
2 and a grout pump 22 are communicated with each other. When the empty detection sensor 16 detects that the slurry is empty (Step 130), the switching valve 20 is switched and the right stirring tank 14 and the grout pump 22 are communicated (Step 140). The slurry in 14 is discharged from grout pump 22. Therefore, the left stirring tank 12
Even when the right stirring tank 14 is empty, the slurry in the right stirring tank 14 is pumped from the grout pump 22, and the slurry is continuously supplied.

右攪拌槽14からスラリーを吐出している間に、左攪拌
槽12には、再び所定量の水、セメント等が投入されて
スラリーが生産される。右攪拌槽14に設けられた空検
知センサ18により右攪拌槽14内のスラリーがなくな
ったことが空検知センサ18により検出されるとくステ
ップ150)、切換弁20を切換えて(ステップ120
)、左攪拌槽14とグラウトポンプ22とを連通し、グ
ラウトポンプ22からスラリーを圧送する。以下、ステ
ップ120以下の処理を繰り返し実行してスラリーを連
続して供給する。
While the slurry is being discharged from the right stirring tank 14, a predetermined amount of water, cement, etc. is again put into the left stirring tank 12 to produce slurry. When the empty detection sensor 18 provided in the right stirring tank 14 detects that the slurry in the right stirring tank 14 has run out (Step 150), the switching valve 20 is switched (Step 120).
), the left stirring tank 14 and the grout pump 22 are communicated, and the slurry is pumped from the grout pump 22. Thereafter, the processes from step 120 onwards are repeatedly executed to continuously supply the slurry.

尚、ステップ120ないし150の処理が切換弁制御手
段として動く。
Note that the processes in steps 120 to 150 operate as switching valve control means.

両攪拌羽根8,10は連続して回転されているので、グ
ラウトポンプ22と切換弁20により連通されていない
側の一方の左右攪拌槽12.14は、アジテータとして
働いている。また、本実施例では、2台の左右攪拌槽1
2,14としたが、更に、3台以上の攪拌槽を設けて切
換弁により切換えて、その内の1台の攪拌槽とグラウト
ポンプ22とを連通ずる構成としても実施可能である。
Since both stirring blades 8, 10 are continuously rotated, the left and right stirring tanks 12, 14 on the side not communicating with the grout pump 22 through the switching valve 20 function as an agitator. In addition, in this embodiment, two left and right stirring tanks 1
2 and 14, it is also possible to provide a configuration in which three or more stirring tanks are provided and switched by a switching valve, and one of the stirring tanks and the grout pump 22 are communicated with each other.

前述した如く、本実施例の連続式バッチャ−プラントは
、空検知センサ16が、左攪拌槽12内に混線流体とし
てのスラリーがなくなったことを検出すると、(ステッ
プ130)、切換弁20を切換えて、空でない右攪拌槽
14とグラウトポンプ22とを連通ずる(ステップ14
0)。また、右攪拌槽14にスラリーがなくなったこと
が空検知センサ18により検出されると(ステップ15
0)、切換弁20を切換えて、再びスラリーが生産され
ている左攪拌槽12とグラウトポンプ22とを連通ずる
(ステップ120)。
As mentioned above, in the continuous batcher plant of this embodiment, when the empty detection sensor 16 detects that there is no slurry as a crosstalk fluid in the left stirring tank 12 (step 130), the switching valve 20 is switched. to communicate the right stirring tank 14, which is not empty, with the grout pump 22 (step 14).
0). Further, when the empty detection sensor 18 detects that there is no slurry in the right stirring tank 14 (step 15
0), the switching valve 20 is switched to again communicate the left stirring tank 12 in which slurry is being produced with the grout pump 22 (step 120).

従って、本実施例の連続式バッチャ−プラントによると
、特別にアジテータ等を設りなくとも、混線流体として
のスラリーを連続して供給することができると共に、は
つり作業を行なう必要がなく、メンテナンスが容易であ
る。
Therefore, according to the continuous batcher plant of this embodiment, it is possible to continuously supply slurry as a cross-circuit fluid without installing a special agitator, etc., and there is no need for chisel work and maintenance is simple. It's easy.

以上本発明の実施例について説明したが、本発明はこの
ような実施例に何重限定されるものではなく、本発明の
要旨を逸脱しない範囲において種々なる態様で実施し得
ることは勿論である。
Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it goes without saying that it can be implemented in various forms without departing from the gist of the present invention. .

1里旦四里 以上詳)ホしたように本発明の連続式バッチャープラン
トによると、混線流体を連続して供給することができる
と共に、はつり作業を行なう必要がなく、メンテナンス
が容易であるという効果を奏する。
(Details of more than 1 mile and 4 miles) As mentioned above, according to the continuous batcher plant of the present invention, it is possible to continuously supply mixed fluid, and there is no need for chisel work, making maintenance easy. be effective.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例としての連続式バッチャ−プ
ラントの概略構成図、第2図は本実施例の制御回路にお
いて行なわれる制御ルーチンの一例を示すフローチャー
トである。
FIG. 1 is a schematic configuration diagram of a continuous batcher plant as an embodiment of the present invention, and FIG. 2 is a flowchart showing an example of a control routine performed in the control circuit of this embodiment.

Claims (1)

【特許請求の範囲】 複数の攪拌槽から吐出された混練流体をグラウトポンプ
により連続的に供給する連続式バッチャープラントにお
いて 前記複数の攪拌槽に設けられ、攪拌槽内の混練流体がな
くなったことを検出する空検知センサと、前記グラウト
ポンプと前記複数の攪拌槽の内のいずれかとを選択的に
連通する切換弁と、 前記空検知センサにより、いずれかの攪拌槽内の混練流
体がなくなつたことが検出されたときに、前記切換弁を
制御して、空でない他の攪拌槽と前記グラウトポンプと
を連通する切換弁制御手段と、を備えたことを特徴とす
る連続式バッチャープラント。
[Scope of Claims] A continuous batcher plant in which kneading fluid discharged from a plurality of stirring tanks is continuously supplied by a grout pump, provided in the plurality of stirring tanks, and the kneading fluid in the stirring tanks runs out. a switching valve that selectively communicates the grout pump with any one of the plurality of stirring tanks; and the empty detection sensor detects when the kneading fluid in one of the stirring tanks runs out. a switching valve control means that controls the switching valve to communicate the grout pump with another stirring tank that is not empty when the grout pump is detected. .
JP62135703A 1987-05-29 1987-05-29 Continuous batcher plant Expired - Lifetime JP2603633B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62135703A JP2603633B2 (en) 1987-05-29 1987-05-29 Continuous batcher plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62135703A JP2603633B2 (en) 1987-05-29 1987-05-29 Continuous batcher plant

Publications (2)

Publication Number Publication Date
JPS63297001A true JPS63297001A (en) 1988-12-05
JP2603633B2 JP2603633B2 (en) 1997-04-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP62135703A Expired - Lifetime JP2603633B2 (en) 1987-05-29 1987-05-29 Continuous batcher plant

Country Status (1)

Country Link
JP (1) JP2603633B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114014235A (en) * 2021-12-30 2022-02-08 北京三元食品股份有限公司 Flexible filling system for liquid materials

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56176036U (en) * 1980-05-29 1981-12-25
JPS5898129A (en) * 1981-12-08 1983-06-10 Hazama Gumi Ltd Automatic supply system of agitator
JPS60199613A (en) * 1984-03-23 1985-10-09 三和機材株式会社 Automatic manufacturing plant for cement milk

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56176036U (en) * 1980-05-29 1981-12-25
JPS5898129A (en) * 1981-12-08 1983-06-10 Hazama Gumi Ltd Automatic supply system of agitator
JPS60199613A (en) * 1984-03-23 1985-10-09 三和機材株式会社 Automatic manufacturing plant for cement milk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114014235A (en) * 2021-12-30 2022-02-08 北京三元食品股份有限公司 Flexible filling system for liquid materials
CN114014235B (en) * 2021-12-30 2022-04-01 北京三元食品股份有限公司 Flexible filling system for liquid materials

Also Published As

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